Biology Questions

Given a population that contains genetic variation what is the correct sequence of the following events under the influence of natural selection 1 Well adapted individuals leave more offspring than do poorly adapted individual 2 A change occurs in the environment 3 Genetic frequencies within the population change 4 Poorly adapted individuals have decreased survivorship 04 2 1 3 02 4 1 3 02 4 3 1 04 1 2 3 4 2 3 1

Organisms that possess homologous structures probably are headed for extinction by chance had similar mutations in the past have increased genetic diversity evolved from the same ancestor are not related

Unit Test 2 Active 3 5 6 7 8 10 TIME REMAININ 01 20 47 A scientist hypothesized that oxygen atoms from both carbon dioxide and water are used to make glucose during photosynthesis However experimental results using oxygen isotopes showed that all of the oxygen from the water ended up in the oxygen molecules that were produced None of the oxygen from water was found in glucose What should the scientist do to best gain scientific understanding of this topic O Analyze the results and change the experimental methods to retest the hypotheses in a different way O Discard the faulty results that do not support the original hypothesis and repeat the experiment using the same methods O Analyze the procedural errors that took place in the experiment and summarize these in a conclusion statement O Repeat the experiment and adjust new data to support the original hypothesis

An example of a plant responding to its environment would be the opening of in the presence of carbon dioxide A stomata B phloem C the cuticle

ny do we say that populations evolve but not individuals What is actually changing when a population evolves

A plant exhibiting thigmotropism will recoil when it is A responding to touch B responding to light C responding to gravity

Plants may exhibit phototropism in which they respond to sunlight by releasing which stimulates extra growth on the side of the plant bending the plant towards the light source A suberin B a thyroid hormone C auxin

A Plants exhibit positive gravitropism by their roots growing in response to gravity sideways B unwards C downwards

Plants can or green up in response to sunlight A de etoliate B suberize ploem C de lignate D diffuse excess gas

bu observe that 10 out of a population of 50 fruit flies have the homozygous recessive trait of sepia eyes How would you calculate q use 40 divided by 50 as p then solve for q take 10 divided by 50 and then square it divide 10 by 50 take the square root of 10 divided by 50 multiply 10 by 2

De etoliation is a plant s way of responding to A loss of water B potential dessication C sunlight D excess gas

When comparing birds to mammals which of the following would be considered shared ancestral characteristics Select all that apply hair vertebrae four limbs amniotic reproduction none of these are ancestral

it reasonable to assume that dinosaurs some of which are direct ancestors of birds might share some characteristics with modern day birds

Evolution in a population requires which of the following Select all that apply there must be a change in the allele frequencies of the population from one generation to the next no genetic drift selection must be random the population must always be small all members of the population must be able to reproduce

ows with average sized wings survive severe storms better than those with longer or shorter wings illustrating frequency dependent selection stabilizing selection Odisruptive selection neutral variation the bottleneck effect

of the following would be considered derived characteristics of all mammals when comparing them to other animal groups Select all that apply four limbs endothermy fur or hair amniotic reproduction vertebrae none of these

requires that populations become better suited to their environments must happen whenever a population is not well adapted to its environment must happen due to organisms innate desire to survive O can happen whenever any of the conditions for Hardy Weinberg equilibrium are not met Orequires the operation of natural selection

owing anatomical structures which is homologous to the wing of a bird fin of a dolphin Oleg of a cricket O tail of a kangaroo wing of a butterfly Question 8 1 point Listen

a comparison of birds and mammals having four limbs is a character useful for distinguishing birds from mammals an example of analogy rather than homology O a shared ancestral character Oa shared derived character O a character useful for sorting bird species

ural selection changes allele frequencies because some reproduce more successfully than others Oloci individuals gene pools alleles species survive and

fly population has a gene with two alleles A1 dominant and A2 recessive Tests show that 70 of the gametes produced in the population contain the A1 allele If the population is in Hardy Weinberg equilibrium what is the frequency of the homozyous recessive genotype 0 42 00 3 0 7 0 09 0 49

na comparison of reptiles and mammals having four limbs is a shared derived character a shared ancestral character a character useful for sorting bird species a character useful for distinguishing reptiles from mammals O an example of analogy rather than homology

In a comparison of reptiles and amphibians having four limbs is a character useful for sorting bird species a shared ancestral character a character useful for distinguishing reptiles from amphibians O an example of analogy rather than homology Oa shared derived character

phylogeny a true clade consists of all organisms that share similar characteristics all members of sister taxa a single ancestral species and all descendants all ancestral species and at least one descendant all organisms that show derived characters not necessarily the same o

Why do we say that populations evolve but not individuals What is actually changing when a population evolves

ding to parsimony the simplest phylogenetic tree is a tree only using the DNA evidence as this provides the simplest explanation for evolution the tree in which the branch points are based on as many shared derived characters as possible O the tree that represents the fewest evolutionary events like changes in DNA sequences or morphology O the tree with the fewest branch tips the smallest tree possible

cat is a member of the cat family clade Felidae but is also a type of mammal which is a clade In this instance which clade is more inclusive bigger than the other The cat family because it includes all types of cats not just house cats The cat family because all cats are mammals The mammal clade because it includes families other than the cat family The mammal clade because most mammals are cats The clades are equal in size since they cannot overlap Question 61 point

Which of the following statements best summarizes evolution by natural selection as it is viewed today It is really is the same as gene flow It represents the result of selection for acquired characteristics in organisms It can only occur in very large populations It is the differential survival and reproduction of the most fit phenotypes Natural selection can only occur when mutations happen

Aquatic plants adapting to life on land had to develop new forms of support to cope with the effects of A herbivory B ATP production C gravity

To compensate for the loss of buoyancy in an aquatic environment and to counteract the impacts of gravity in a terrestrial biome plants need and cellulose in their cell walls J

MacLellan John 12 51 p m Baldness b is an X linked recessive allele If a mom is heterozygous for baldness and the dad is bald what is the chance of a baby boy being born with normal hair Show all 8 steps in your answer

To compensate for the loss of in an aquatic environment and to counteract the impacts of gravity in a terrestrial biome plants need and cellulose in their cell walls A buoyancy B gravity C water

Code Female XX male XY mom XX DAD XY

Land plants cannot rely on to obtain water they must transport water through a root system A turgor pressure B osmosis C transpiration D active transport

When plants colonized on land which of the following was NOT an obstacle they had to overcome A autotrophy vs heterotrophy B transport of water C method of gas exchange D gravity vs buoyancy

Land plants cannot rely on simple diffusion for the circulation of water and nutrients they have xylem and A phloem B suberin C osmosis Tieni

The waxy on the surface of leaves is an adaptation land plants use to prevent dessication peduncle B phospho lipid hilaver cuticle

The second paragraph of the Declaration of Independence establishes general principles about the rights of man and the role of government What is the most likely reason that Jefferson included this section We hold these truths to be self evident that all men are created equal that they are endowed by their Creator with certain unalienable rights that among these are life liberty and the pursuit of happiness That to secure these rights governments are instituted among men deriving their just powers from the consent of the governed A It expresses the premises on which he draws his conclusion OB It introduces a point of agreement before addressing points of conflict C It helps maintain a neutral tone by speaking in generalities rather than specifics D It explains why he feels insecure about the colonies being under British rule

When did the igneous intrusion with x s occur Explain by telling what happened before and after and how you know Please use complete and correct sentences

Solve the relative dating problem in block 3 Write the letters in relative order with the oldest being listed first and the youngest list last Include all events folding faulting etc in their proper sequence Add words for erosion events folding events intrusions faults tilting etc If a fault or other event is labeled with a letter refer to it as Fault A If there are several faults and they are not labeled you may say the fault on the left or the fault on the right List the events in the space below starting with the oldest and ending with the youngest Separate each event with a comma Block 3 www O S z Erosion U Folding B

What is the chance of a tall white offspring if one parent is heterozygous tall and white and the other parent is short and heterozygous green Show all 8 steps in your answer

Each of the boxes below is labeled with a term from the Natural and Sexual Selection video As you watch the video place each lettered choice in its most appropriate box If you think a choice always applies to more than one term box write the letter for that choice only once in the largest of the boxes that you think it applies to a Occurs when food sources are dispersed b The process by which traits become more or less common depending on an individual s ability to mate with more or better partners c Males with ornaments that females find attractive are able to mate with more females and pass on their genes d Produces females and males of the same species that look similar e Occurs when food sources are clustered f Produces females and males of the same species that look different g The process by which traits become more or less common depending on an individual s ability to survive and gather resources h i j Results in fancy extravagant males Males that are better able to defend their territory are able to mate with more females and pass on their genes Results in males that are better suited for fighting Natural Selection Sexual Selection Female Choice Male Male Competition

Which of the following is an accurate statement about the phases of mitosis O O O O Interphase is the first phase mitosis During prophase chromos align in the middle waiting separate During metaphase only chromatin is present During anaphase chromos begin to separate I DON T KNOW YET

Which of the following best summarizes the process of DNA replication O O O mRNA nucleotides copy information from one strand of the DNA DNA nucleotides build new copies of both strands of DNA It involves transcription and translation of both strands of the DNA It occurs at the ribosome and involves all three types of RNA I DON T KNOW YET

Challenge 2 In an experiment with zebra finches researchers placed artificial red tags on the heads of some of the males see pics in PowerPoint Females were then allowed to choose their mates for breeding 1 When given a choice between normal males and males with tags on their heads which males do you think the females preferred Why 2 How would their choices affect their offspring X

Challenge 1 In red phalaropes the females are much more brightly colored than the males see pics on next slide 1 What predictions can you make about their breeding system monogamy polygamy polyandry 2 What do you think the roles of the males and females are in terms of raising young 3 Why do males and females look the same in the winter

to win the hearts of females In what way is natural selection and sexual selection a balancing act for males 15 Natural Selection Sexual Selection Female Choice The Cornelllab of Ornithology inofirds Doceeduki2 Paradise SLU PLAVALHAL Male Male Competition 17 Follow Up Questions What benefit do females think they are getting by choosing certain males Why do bright colors elaborate dances indicate to a female What types of traits are favored in males that are involved in male to male competition

Calcium s atomic number is 20 It forms ions with 18 electrons What is the electrical charge of a calcium ion View Available Hint s 0 2 O 2 O 1 0 1 Submit 13

How do ions form ionic bonds View Available Hint s lons of opposite electrical charges are attracted to each other to balance the charges Two atoms come together to share their electrons One atom swaps all of its negative electrons for all of the other atom s positive protons lons of the same type are drawn together because they are attracted to their own kind Submit

Part A What is an ion View Available Hint s an atom that is sharing electrons with another atom Oan atom that has either gained or lost electron s Oan atom that loses all of its protons Oan atom that has lost one or more neutrons