The Living World Questions and Answers

What causes streams to meander A Underlying bed material is soft and slides easily B Variations in stream velocity cause uneven erosion and deposition C Floodplains widen significantly allowing more stream movement D Meandering only happens during floods E Meandering streams are not subject to natural laws
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What causes streams to meander A Underlying bed material is soft and slides easily B Variations in stream velocity cause uneven erosion and deposition C Floodplains widen significantly allowing more stream movement D Meandering only happens during floods E Meandering streams are not subject to natural laws
Blood returning to the mammalian heart in a pulmonary vein drains first into the vena cava left atrium right atrium d left ventricle
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Blood returning to the mammalian heart in a pulmonary vein drains first into the vena cava left atrium right atrium d left ventricle
Catalase peroxidase and superoxide dismutase are examples of enzymes that can convert reactive oxygen species into water Having these enzymes is essential for the survival of cells that are exposed to temperatures above 100 C O2 gas O All answers are correct O CO gas
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Catalase peroxidase and superoxide dismutase are examples of enzymes that can convert reactive oxygen species into water Having these enzymes is essential for the survival of cells that are exposed to temperatures above 100 C O2 gas O All answers are correct O CO gas
Click to see additional instructions Use the following information to answer questions 2 3 and 4 To measure primary production of algae in a stream you place two sealed chambers in the stream each enclosing the sediments as well as the water above them One chamber is covered with black tape blocking all light while the other is transparent to light You measure dissolved oxygen DO before and after a 24 hour incubation DO in the light chamber increased by 1 5 g m2 while DO in the dark chamber decreased by 2 0 g m2 Hint You have all the information you need to answer the following 3 questions you do not need initial and final DO values Think carefully about what is actua being measured in each of the two chambers What is the estimated ecosystem respiration Re for the stream Enter ONLY A NUMBER The units for your answer are g 02 m 2 day 1 Question 3 of 7 1 Points Click to see additional instructions What is the stream s esitmated NEP net ecosystem production Enter ONLY a number The units for your answer are g 02 m 2 day 1
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Click to see additional instructions Use the following information to answer questions 2 3 and 4 To measure primary production of algae in a stream you place two sealed chambers in the stream each enclosing the sediments as well as the water above them One chamber is covered with black tape blocking all light while the other is transparent to light You measure dissolved oxygen DO before and after a 24 hour incubation DO in the light chamber increased by 1 5 g m2 while DO in the dark chamber decreased by 2 0 g m2 Hint You have all the information you need to answer the following 3 questions you do not need initial and final DO values Think carefully about what is actua being measured in each of the two chambers What is the estimated ecosystem respiration Re for the stream Enter ONLY A NUMBER The units for your answer are g 02 m 2 day 1 Question 3 of 7 1 Points Click to see additional instructions What is the stream s esitmated NEP net ecosystem production Enter ONLY a number The units for your answer are g 02 m 2 day 1
1 What gas is being produced to create the gas bubble 2 Production of this gas is an indicator that what process is occurring 3 Identify the independent and dependent variables for this experiment 4 Describe other approaches we could have used to measure the rate of fermentation that measure the consumption of the substrates rather than the concentration or volume of the products 5 Did the yeast function aerobically or anaerobically Explain 6 Which carbohydrate solution resulted in the largest bubble 7 Which carbohydrate solution resulted in the smallest bubble 8 How do your results relate to the ability of yeast to metabolize different carbohydrates 9 Both cellular respiration and fermentation usually begin with what molecule Where do the pathways separate 10 How do the reactants and products differ in fermentation as compared with aerobic respiration 11 Why would measuring NAD NADH not be an effective way of measuring fermentation rates 12 How do non sugar molecules fit into respiration and fermentation
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1 What gas is being produced to create the gas bubble 2 Production of this gas is an indicator that what process is occurring 3 Identify the independent and dependent variables for this experiment 4 Describe other approaches we could have used to measure the rate of fermentation that measure the consumption of the substrates rather than the concentration or volume of the products 5 Did the yeast function aerobically or anaerobically Explain 6 Which carbohydrate solution resulted in the largest bubble 7 Which carbohydrate solution resulted in the smallest bubble 8 How do your results relate to the ability of yeast to metabolize different carbohydrates 9 Both cellular respiration and fermentation usually begin with what molecule Where do the pathways separate 10 How do the reactants and products differ in fermentation as compared with aerobic respiration 11 Why would measuring NAD NADH not be an effective way of measuring fermentation rates 12 How do non sugar molecules fit into respiration and fermentation
I relate to Erikson s autonomy versus shame and doubt This stage begins around 18 months when toddlers build self awareness At this stage toddles want to make their own choices themselves therefore parents must give the child space and offer support if needed If parents hoover their children and don t allow them the freedom or access to think for themselves a child will build shame and self doubt they will lack confidence and become relient of their parents Since I was my mom s first child she admits to having a lot fear of allowing me to do things that would make her uncomfortable so she would either do it for me or make me stop For a while I was anxious doing things because I was anxious that my mom would find out For example my mom did not allow me to walk alone in middle school She would talk about the dangers out in the real world when my friends wanted to walk to 711 I would want to join them but I would always become anxious that something would happen to me or that my mom would find out
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I relate to Erikson s autonomy versus shame and doubt This stage begins around 18 months when toddlers build self awareness At this stage toddles want to make their own choices themselves therefore parents must give the child space and offer support if needed If parents hoover their children and don t allow them the freedom or access to think for themselves a child will build shame and self doubt they will lack confidence and become relient of their parents Since I was my mom s first child she admits to having a lot fear of allowing me to do things that would make her uncomfortable so she would either do it for me or make me stop For a while I was anxious doing things because I was anxious that my mom would find out For example my mom did not allow me to walk alone in middle school She would talk about the dangers out in the real world when my friends wanted to walk to 711 I would want to join them but I would always become anxious that something would happen to me or that my mom would find out
mixture of proteins by charge PCR SDS PAGE lon exchange chromatography Ammonium sulfate precipitation Question 2 1 point 4 Listen Determine the amount of ammonium sulfate needed to reach 37 saturation level if you have 55mL 11550 grams 11 55 grams 1155 grams
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mixture of proteins by charge PCR SDS PAGE lon exchange chromatography Ammonium sulfate precipitation Question 2 1 point 4 Listen Determine the amount of ammonium sulfate needed to reach 37 saturation level if you have 55mL 11550 grams 11 55 grams 1155 grams
The detection method used in our experiment to verify isolation of proteins on the western blot is called Chemiluminescent Colorimetric detection Spectrum analysis Lepelveis
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The detection method used in our experiment to verify isolation of proteins on the western blot is called Chemiluminescent Colorimetric detection Spectrum analysis Lepelveis
Crocodiles are archosaurs O True O False
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Crocodiles are archosaurs O True O False
Which reptile group had has en elongated fourth digit on the hand O lizards O turtles O crocodiles
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Which reptile group had has en elongated fourth digit on the hand O lizards O turtles O crocodiles
Lizards and allied groups have a sprawling gait O True O False
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Lizards and allied groups have a sprawling gait O True O False
Label the following diagram illustrating how Listeria monocytogenes can move among its various reservoirs to infect humans Whole vegetables Plants Soil Water Sewage Manure Equipment and environmental sources Humans Other meat producing animals and fish Ruminants B E Silage Carcass cuts Processed food Liquid milk
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Label the following diagram illustrating how Listeria monocytogenes can move among its various reservoirs to infect humans Whole vegetables Plants Soil Water Sewage Manure Equipment and environmental sources Humans Other meat producing animals and fish Ruminants B E Silage Carcass cuts Processed food Liquid milk
Consumer Animal Cell Model Q1 To where does carbon dioxide go Q2 In what way s can carbon dioxide get there Q3 To where does oxygen go Q4 In what way s can oxygen get there Q5 Where is glucose broken down in the cell Q6 How is glucose transported to different cells Q7 How do you know the answer to Q6 Q8 How is your answer to Q6 different than in plants Q9 Where in the cell does glucose end up Why Q10 How is homeostasis maintained in this organism using your answers above
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Consumer Animal Cell Model Q1 To where does carbon dioxide go Q2 In what way s can carbon dioxide get there Q3 To where does oxygen go Q4 In what way s can oxygen get there Q5 Where is glucose broken down in the cell Q6 How is glucose transported to different cells Q7 How do you know the answer to Q6 Q8 How is your answer to Q6 different than in plants Q9 Where in the cell does glucose end up Why Q10 How is homeostasis maintained in this organism using your answers above
Q1 To where does carbon dioxide go Q2 In what way s can carbon dioxide get there Q3 To where does oxygen go Q4 In what way s can oxygen get there Q5 Where is glucose made in the cell Q6 From which types of plant cells does glucose originate Q7 Which types of plant cells must receive glucose from other plant cells Q8 How do you know the answer to Q7 Q9 Where in the cell does glucose end up Why Q10 How do the two organelles mentioned in your answers maintain homeostasis in this organism Go to the next page to answer questions about your Animal Cell Model
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Q1 To where does carbon dioxide go Q2 In what way s can carbon dioxide get there Q3 To where does oxygen go Q4 In what way s can oxygen get there Q5 Where is glucose made in the cell Q6 From which types of plant cells does glucose originate Q7 Which types of plant cells must receive glucose from other plant cells Q8 How do you know the answer to Q7 Q9 Where in the cell does glucose end up Why Q10 How do the two organelles mentioned in your answers maintain homeostasis in this organism Go to the next page to answer questions about your Animal Cell Model
The palm like structure identified below is the Archegonia of mosses
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The palm like structure identified below is the Archegonia of mosses
Why did the US pass the Espionage and Sedition Acts during WWI What were some of the effects of Prohibition during the 1920 s What was Hoover s response to the Great Depression Why did American Citizens criticize him List the causes of the Dust Bowl
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Why did the US pass the Espionage and Sedition Acts during WWI What were some of the effects of Prohibition during the 1920 s What was Hoover s response to the Great Depression Why did American Citizens criticize him List the causes of the Dust Bowl
Describe the impact of the Works Progress Administration Explain how Eleanor Roosevelt impacted and changed the role of First Lady of the United States
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Describe the impact of the Works Progress Administration Explain how Eleanor Roosevelt impacted and changed the role of First Lady of the United States
For the following bacteria observed as flagella stains determine the flagella arrangement and cell shape Spirillum volutans Flagella arrangement Cell shape spirillum Proteus mirabilis amphitrichous Flagella arrangement peritrichous Cell shape bacillus K
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For the following bacteria observed as flagella stains determine the flagella arrangement and cell shape Spirillum volutans Flagella arrangement Cell shape spirillum Proteus mirabilis amphitrichous Flagella arrangement peritrichous Cell shape bacillus K
A colony of bacteria starts with 50 organisms and quadruples each day Write an exponential function P t that represents the population of the bacteria after t days Then find the number of bacteria that will be in the colony after 5 days Find an exponential function P t that models this population P t DAY 0 50
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A colony of bacteria starts with 50 organisms and quadruples each day Write an exponential function P t that represents the population of the bacteria after t days Then find the number of bacteria that will be in the colony after 5 days Find an exponential function P t that models this population P t DAY 0 50
stion 16 On a phylogenetic tree which term refers to lineages that diverged from the same place O sister taxa
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stion 16 On a phylogenetic tree which term refers to lineages that diverged from the same place O sister taxa
Question 3 Tor F The capsomere is made up of small protein subunits called capsids O True O False
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Question 3 Tor F The capsomere is made up of small protein subunits called capsids O True O False
erved offspring AABB 5 AaBB 15 aa88 8 see below Mating AaBb x AaBb 1 pt AABb 10 88bb 6 BaBb 30 aaBb 11 Babb 13 aabb 2 the observed offspring the result of the parents using chi square stati
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erved offspring AABB 5 AaBB 15 aa88 8 see below Mating AaBb x AaBb 1 pt AABb 10 88bb 6 BaBb 30 aaBb 11 Babb 13 aabb 2 the observed offspring the result of the parents using chi square stati
Which of the following compounds would be used by a chemoorganotroph for generating energy O glucose carbon dioxide O light O iron
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Which of the following compounds would be used by a chemoorganotroph for generating energy O glucose carbon dioxide O light O iron
Which metric describes the number of different species present in a community O species diversity species abundance O species evenness O species richness
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Which metric describes the number of different species present in a community O species diversity species abundance O species evenness O species richness
What compound do most chemolithotrophs use as a source of carbon to build biomass O glucose carbon dioxide O organic sources other than glucose
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What compound do most chemolithotrophs use as a source of carbon to build biomass O glucose carbon dioxide O organic sources other than glucose
Which biomolecule functions as the major light harvesting pigment in cyanobacteria chlorophyll carotenoids bacteriochlorophyll chlorosomes
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Which biomolecule functions as the major light harvesting pigment in cyanobacteria chlorophyll carotenoids bacteriochlorophyll chlorosomes
Which metabolic strategy is most common in chemolithotrophic microbial mats at the surface of deepsea sediment O ammonia oxidation sulfide oxidation O iron oxidation O nitrate reduction
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Which metabolic strategy is most common in chemolithotrophic microbial mats at the surface of deepsea sediment O ammonia oxidation sulfide oxidation O iron oxidation O nitrate reduction
What type of energy yielding metabolism is found ONLY in Bacteria and Archaea not in Eukarya chemolithotrophy O chemoorganotrophy
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What type of energy yielding metabolism is found ONLY in Bacteria and Archaea not in Eukarya chemolithotrophy O chemoorganotrophy
Part C Directions For 3 5 answer the question Are the observed offspring the result of the parents using chi square statistics Include a copy of your calculations when you submit your assignment You can copy and paste your table from Excel below Make sure to answer the questions 3 Observed offspring AA 40 Aa 45 aa 0 Mating Aa x Aa 1 pt Are the observed offspring the result of the parents using chi square statistics 4 Observed offspring BB 25 Bb 15 bb 2 Mating Bb x BB 1 pt a This is a special case Do you need statistics to rule out this possibility Why or why not Are the observed offspring the result of the parents using chi square statistics 5 Observed offspring see below Mating AaBb x AaBb 1 pt AABB 5 AABb 10 AAbb 6 AaBB 15 AaBb 30 Aabb 13 aaBB 8 aaBb 11 aabb 2
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Part C Directions For 3 5 answer the question Are the observed offspring the result of the parents using chi square statistics Include a copy of your calculations when you submit your assignment You can copy and paste your table from Excel below Make sure to answer the questions 3 Observed offspring AA 40 Aa 45 aa 0 Mating Aa x Aa 1 pt Are the observed offspring the result of the parents using chi square statistics 4 Observed offspring BB 25 Bb 15 bb 2 Mating Bb x BB 1 pt a This is a special case Do you need statistics to rule out this possibility Why or why not Are the observed offspring the result of the parents using chi square statistics 5 Observed offspring see below Mating AaBb x AaBb 1 pt AABB 5 AABb 10 AAbb 6 AaBB 15 AaBb 30 Aabb 13 aaBB 8 aaBb 11 aabb 2
Part A Directions Use the genetic information from the child you produced with your partner in lab to draw what your child would look like on a separate piece of paper You will need to finish filling out the table for your child s phenotype if you did not in lab Include the finished table and your drawing to this post lab exercise when you submit it You will not be graded on your artistic ability however you must attempt to seriously draw your child to reflect their genotype Please color your answers as red 4 pt Part B Directions For each question below determine the parent s genotypes the sperm and ova gametes and create the appropriate Punnett square Answer the question for each word problem Do not delete the questions Use the following genetic information to answer the questions in this section In humans Brown eye color B is dominant over the allele for blue eye color b Double jointedness J is dominant over the allele for normal joints j Dimples D is dominant to the allele for no dimples d 1 Mike is heterozygous for both eye color and double jointedness Kathy has blue eyes and is normal jointed What is the probability that their daughter will have blue eyes and be double jointed 1 pt Mike s genotype Kathy s genotype Child s probability 2 Bob has blue eyes and no dimples Helen is heterozygous for eye color and homozygous dominant for dimples What s the probability that their child will have blue eyes and no dimples 1 pt Bob s genotype Helen s genotype Child s probability
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Part A Directions Use the genetic information from the child you produced with your partner in lab to draw what your child would look like on a separate piece of paper You will need to finish filling out the table for your child s phenotype if you did not in lab Include the finished table and your drawing to this post lab exercise when you submit it You will not be graded on your artistic ability however you must attempt to seriously draw your child to reflect their genotype Please color your answers as red 4 pt Part B Directions For each question below determine the parent s genotypes the sperm and ova gametes and create the appropriate Punnett square Answer the question for each word problem Do not delete the questions Use the following genetic information to answer the questions in this section In humans Brown eye color B is dominant over the allele for blue eye color b Double jointedness J is dominant over the allele for normal joints j Dimples D is dominant to the allele for no dimples d 1 Mike is heterozygous for both eye color and double jointedness Kathy has blue eyes and is normal jointed What is the probability that their daughter will have blue eyes and be double jointed 1 pt Mike s genotype Kathy s genotype Child s probability 2 Bob has blue eyes and no dimples Helen is heterozygous for eye color and homozygous dominant for dimples What s the probability that their child will have blue eyes and no dimples 1 pt Bob s genotype Helen s genotype Child s probability
What is the evidence for the early earth being anoxic O volcanic activity would have burned all the oxygen O pyrite minerals susceptible to breakdown by oxygen are abundant in early Archean sediments O it wasn t anoxic all life requires oxygen therefore oxygen had to have been present since the earliest known lif
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What is the evidence for the early earth being anoxic O volcanic activity would have burned all the oxygen O pyrite minerals susceptible to breakdown by oxygen are abundant in early Archean sediments O it wasn t anoxic all life requires oxygen therefore oxygen had to have been present since the earliest known lif
The diagram shows the release of a neurotransmitter across a synapse Presynaptic neuron X Neurotransmitter a ldentify the structure labelled X 1 4Outline the role of the sodium potassium pump in maintaining the resting potential of a neuron 2 5 Compare and contrast hormonal and nervous communication 7
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The diagram shows the release of a neurotransmitter across a synapse Presynaptic neuron X Neurotransmitter a ldentify the structure labelled X 1 4Outline the role of the sodium potassium pump in maintaining the resting potential of a neuron 2 5 Compare and contrast hormonal and nervous communication 7
Examine the Perch skull Looking at the rear of it notice how there is a small braincase housed within an outer skull Draw a cross section of the Perch skull from this perspective This is the primitive condition for many vertebrates Tetrapods included It is called the anapsid condition a braincase a complete outer skull with a space between them 6 On your drawing label the parts that correspond to the braincase holds the brain and sensory organs
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Examine the Perch skull Looking at the rear of it notice how there is a small braincase housed within an outer skull Draw a cross section of the Perch skull from this perspective This is the primitive condition for many vertebrates Tetrapods included It is called the anapsid condition a braincase a complete outer skull with a space between them 6 On your drawing label the parts that correspond to the braincase holds the brain and sensory organs
7 Cycas a cycad is another seed plant that was very common in the Mesozoic Describe very briefly the foliage of both Cycas and Araucaria X Although there were softer plants living at the time e g ferns the abundance of the above two plants and their close relatives dictates that herbivorous dinosaurs must have been eating them ouch
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7 Cycas a cycad is another seed plant that was very common in the Mesozoic Describe very briefly the foliage of both Cycas and Araucaria X Although there were softer plants living at the time e g ferns the abundance of the above two plants and their close relatives dictates that herbivorous dinosaurs must have been eating them ouch
3 Equisetum Calamites and Annularia are members of the Sphenopsids They have a unique anatomy stellar organization meaning they are composed of bundles of tissue arranged in a circle see figure below They also display jointing in the stems very obvious in Equisetum Sketch Calamites a Carboniferous sphenopsid some of which reached over 10 meters in height and identify on your sketch the bundles of tissue and if you can find it a characteristic joint where the tissue bundles pinch out and then expand
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3 Equisetum Calamites and Annularia are members of the Sphenopsids They have a unique anatomy stellar organization meaning they are composed of bundles of tissue arranged in a circle see figure below They also display jointing in the stems very obvious in Equisetum Sketch Calamites a Carboniferous sphenopsid some of which reached over 10 meters in height and identify on your sketch the bundles of tissue and if you can find it a characteristic joint where the tissue bundles pinch out and then expand
and their close relatives dictates that herbivorous dinosaurs must have been eating 8 Angiosperms are more commonly known as the flowering plants and include most of the plants that you are probably familiar with minus the conifers and the ferns Examples include any plant trees included with a flower plus grasses and many shrubs From your notes describe why double fertilization with respect to seed development is a major advantage over the way that conifers produce seeds
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and their close relatives dictates that herbivorous dinosaurs must have been eating 8 Angiosperms are more commonly known as the flowering plants and include most of the plants that you are probably familiar with minus the conifers and the ferns Examples include any plant trees included with a flower plus grasses and many shrubs From your notes describe why double fertilization with respect to seed development is a major advantage over the way that conifers produce seeds
5 Archaeopteris This Late Paleozoic specimen foliage only and its near relatives collectively called the Progymnosperms represent close relatives of the seed plants although they themselves unfortunately lacked the seed habit What are two great advantages that seed plants have compared to Progymnosperms and other plants that lack seeds 1
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5 Archaeopteris This Late Paleozoic specimen foliage only and its near relatives collectively called the Progymnosperms represent close relatives of the seed plants although they themselves unfortunately lacked the seed habit What are two great advantages that seed plants have compared to Progymnosperms and other plants that lack seeds 1
Ferns were also extremely diverse and abundant during the late Paleozoic and into the Mesozoic Some of them evolved a tree form which reached heights of 10 meters Briefly describe the reproductive strategy of ferns as well as the other land plants you have examined so far questions 1 3 You may express your explanation in the form of a diagram if that s easier
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Ferns were also extremely diverse and abundant during the late Paleozoic and into the Mesozoic Some of them evolved a tree form which reached heights of 10 meters Briefly describe the reproductive strategy of ferns as well as the other land plants you have examined so far questions 1 3 You may express your explanation in the form of a diagram if that s easier
2 Sigillaria Members of Lycopoda were the dominant land plants during the Carboniferous In fact most of the coal on earth was formed from the remains of Carboniferous forests which were filled with Lycopods A few surviving members exist but are very small Look at the Sigillaria fossil This fossil is a piece of bark from an arboraceous tree like Lycopod Sketch in detail a portion of it The strange H shaped marks you see are called leaf scars and show where the leaves attached directly to the stalk
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2 Sigillaria Members of Lycopoda were the dominant land plants during the Carboniferous In fact most of the coal on earth was formed from the remains of Carboniferous forests which were filled with Lycopods A few surviving members exist but are very small Look at the Sigillaria fossil This fossil is a piece of bark from an arboraceous tree like Lycopod Sketch in detail a portion of it The strange H shaped marks you see are called leaf scars and show where the leaves attached directly to the stalk
algac 1 Identify place the following evolutionary novelties on the tree below either at the correct node or next to the correct name gametophyte completely parasitic on sporophyte xylem and phloem tissue gametophyte growth reduced to four cells one of which is the egg lignin in some tissues Land Plant diversification Bryophytes Lycopods Ferns and allies land plants Conifers Progymnosperms Sphenopsids Tracheophytes vascular plants Gingkoes Cycads and allies seed plants Ang
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algac 1 Identify place the following evolutionary novelties on the tree below either at the correct node or next to the correct name gametophyte completely parasitic on sporophyte xylem and phloem tissue gametophyte growth reduced to four cells one of which is the egg lignin in some tissues Land Plant diversification Bryophytes Lycopods Ferns and allies land plants Conifers Progymnosperms Sphenopsids Tracheophytes vascular plants Gingkoes Cycads and allies seed plants Ang
Ming evolutionary novelties on the tree below either at the correct node or next to the correct name notochord muscular appendages modified brachial arches clamp together paired appendages myomeres bony ray like appendages cartilaginous skeleton Pikea Early Chordate diversification lamproy Heterostracans earliest vertebrates Vertebrates Osteostracans Placoderms ray fins Actinopterygians Chondrichthyes jawed vertebrates Gnathostomes lobe fins Sarcopterygians
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Ming evolutionary novelties on the tree below either at the correct node or next to the correct name notochord muscular appendages modified brachial arches clamp together paired appendages myomeres bony ray like appendages cartilaginous skeleton Pikea Early Chordate diversification lamproy Heterostracans earliest vertebrates Vertebrates Osteostracans Placoderms ray fins Actinopterygians Chondrichthyes jawed vertebrates Gnathostomes lobe fins Sarcopterygians
The molecular clock has limited usefulness for estimating divergence times among species in part due to the saturation of DNA sequences This occurs because A DNA sequences are unable to revert back to previous allelic states B the variation in the substitution rate between closely related lineages prevents accurate estimation of divergence time C variation in population sizes among lineages changes the effect of genetic drift D in highly diverged lineages substitutions will occur at sites that have been substituted previously
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The molecular clock has limited usefulness for estimating divergence times among species in part due to the saturation of DNA sequences This occurs because A DNA sequences are unable to revert back to previous allelic states B the variation in the substitution rate between closely related lineages prevents accurate estimation of divergence time C variation in population sizes among lineages changes the effect of genetic drift D in highly diverged lineages substitutions will occur at sites that have been substituted previously
You place two nerve cells which have synaptic connection to each other and are normally able to signal to each other in a dish filled with a buffer containing H Na and Cl as the only inorganic ions You stimulate the first neuron by applying a depolarizing voltage across the membrane of one of the dendrites but find that the second neuron does not respond Which of the following is the most likely explanation for its lack of response a An action potential can only be initiated by opening a ligand gated channel b Propagation of the action potential along the axon is prevented by the lack of K in the buffer c The axon membrane is unable to repolarize i this buffer d Neurotransmitter is not being released into the synaptic cleft e Neurotransmitter is released but is unable to stimulate opening of the ligand
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You place two nerve cells which have synaptic connection to each other and are normally able to signal to each other in a dish filled with a buffer containing H Na and Cl as the only inorganic ions You stimulate the first neuron by applying a depolarizing voltage across the membrane of one of the dendrites but find that the second neuron does not respond Which of the following is the most likely explanation for its lack of response a An action potential can only be initiated by opening a ligand gated channel b Propagation of the action potential along the axon is prevented by the lack of K in the buffer c The axon membrane is unable to repolarize i this buffer d Neurotransmitter is not being released into the synaptic cleft e Neurotransmitter is released but is unable to stimulate opening of the ligand
Autologous blood donations are to be used O All are correct O For bone marrow transplant recipients O At a later date by the donor O By HIV positive recipients O By family members of the donor 2
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Autologous blood donations are to be used O All are correct O For bone marrow transplant recipients O At a later date by the donor O By HIV positive recipients O By family members of the donor 2
A woman without prenatal care delivers a healthy term infant A cord blood sample shows the infant is A positive with a positive DAT The workup of the unexpected finding should include O Direct antiglobulin testing of the mother s specimen O None is correct O ABO testing of the mother O ABO and Rh typing of the father Anti C3 antiglobulin test
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A woman without prenatal care delivers a healthy term infant A cord blood sample shows the infant is A positive with a positive DAT The workup of the unexpected finding should include O Direct antiglobulin testing of the mother s specimen O None is correct O ABO testing of the mother O ABO and Rh typing of the father Anti C3 antiglobulin test
Which of the following statements is false concerning the dideoxynucleotides ddNTPs used in Fred Sanger s dideoxy chain termination method of DNA sequencing O If a ddNTP is added to a growing DNA strand the chain cannot be extended any further The dideoxynucleotides are not able to be detected in gel electrophoresis Dideoxynucleotides ddNTPs are chain terminators Dideoxynucleotides ddNTPs are flourescently dyed
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Which of the following statements is false concerning the dideoxynucleotides ddNTPs used in Fred Sanger s dideoxy chain termination method of DNA sequencing O If a ddNTP is added to a growing DNA strand the chain cannot be extended any further The dideoxynucleotides are not able to be detected in gel electrophoresis Dideoxynucleotides ddNTPs are chain terminators Dideoxynucleotides ddNTPs are flourescently dyed
Question 2 How did the allelic frequencies change over the 10 generations modeled in response to natural selection Do you think the white allele could be eliminated from the population if the model had continued for 10 more generations Reference Graph 2 in your explanation 0 Word s IUE ET T B Question 3 A mutation occurs in a population of rabbits affecting ear length After multiple generations 30 of the population exhibit the new recessive phenotype for short ears Use the Hardy Weinberg equation to determine the genotypic frequencies of the rabbit population Show all work in your answer B J U E T T 0 Word s
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Question 2 How did the allelic frequencies change over the 10 generations modeled in response to natural selection Do you think the white allele could be eliminated from the population if the model had continued for 10 more generations Reference Graph 2 in your explanation 0 Word s IUE ET T B Question 3 A mutation occurs in a population of rabbits affecting ear length After multiple generations 30 of the population exhibit the new recessive phenotype for short ears Use the Hardy Weinberg equation to determine the genotypic frequencies of the rabbit population Show all work in your answer B J U E T T 0 Word s
the Great Depression by providing relief to people in need by creating programs to help the nation recover from economic ruin and provide a framework to reform the system to try to prevent another economic depression Determine which of these goals each program had in mind Relief Recovery Reform
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the Great Depression by providing relief to people in need by creating programs to help the nation recover from economic ruin and provide a framework to reform the system to try to prevent another economic depression Determine which of these goals each program had in mind Relief Recovery Reform
Indicat Choose production of egg sex cells mitosis formation of a scar meiosis prokariota cell division Choose osis is responsible for the type of cell division
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Indicat Choose production of egg sex cells mitosis formation of a scar meiosis prokariota cell division Choose osis is responsible for the type of cell division
What is the name of the process by which en early embryo attaches to the uterine wall Select one O a gastrulation b ovulation O c implantation d fertilisation
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What is the name of the process by which en early embryo attaches to the uterine wall Select one O a gastrulation b ovulation O c implantation d fertilisation