Biology Questions

What is the overall Partern that would reduce the risk for getting hepatitis B

Extra Credit 1 point will be graded manually The new U S government source to help with the population s diet and nutrition is known as the nutritional square the nutritional line

What is the primary purpose of creating New Federalism O To dismantle Trickle Down Plan O To dismantle Great Society programs

Answer all parts of the question asked in the space provided Show all your work Determine the dilution for each of the following a 100 L of sample into 900 L of diluent b 0 1 mL of sample into 9mL of diluent dilution dilution

After a severe draught in the Galapagos islands Darwin observed a change in Daphne beaks depth Which statement about the beak size of finches on the island of Daphne Major during prolonged drought is true Mean bank depth Percentag In each dans 12 9 10 Beak All Daphne hirde 1975 11 depth mm Total number of birds 753 12 13 14 Drought in 1977 12 Mean beak depth 1879 Survivors Total number of birds 00 9 10 Beak depth mm 11 12 13 Each bird evolved a deeper stronger beak as the drought persisted Each bird s survival was strongly influenced by the depth and strength of its beak as the drought persisted The frequency of the strong beak alleles increased in each bird as the drought persisted Each bird that survived the drought produced only offspring with deeper stronger beaks than seen in the previous generation

0 1 02 5 3 3 4 4 7 9 1 Frontal section showing interior chambers and valves 8 2 6 11 12 13 10 14 15 16 17 Which of the structures in the heart diagram above is the superior vena cava 18 19 20

Lactic acid fermentation produces lactic acid Homolactic fermentation produces lactic acid Heterolactic fermentation produces lactic acid and or other compounds Alcohol fermentation produces ethanol CO Organism Fermentation end product s Streptococcus Lactobacillus Bacillus Lactic acid Saccharomyces yeast Ethanol and CO Pyruvic acid Propionibacterium Propionic acid acetic acid CO and H Clostridium Butyric acid butanol acetone isopropyl alcohol and CO Escherichia Salmonella Ethanol lactic acid succinic acid acetic acid CO and H Enterobacter Ethanol lactic acid formic acid butanediol acetoin CO and H

Explain using your own words how the action potential is generated and regenerated in neurons Your explanation should begin with the event that leads the release of neurotransmitters at the presynaptic terminal and how these neurotransmitters lead to changes in the membrane potential in the postsynaptic neuron that result in the generation of the action potential Also how is the action potential maintained with the same amplitude through the whole axon The explanation should include the correct name of the structures involved type of channels and ions involved the type of voltage changes that occur in dendrites soma and axons

Explain how neuromodulators are different from neurotransmitters Include the type of neurotransmission they produce receptor they neurotransmitters and neuromodulators bind the intracellular changes they cause and how they affect the membrane potential

A comprehensive metabolic panel CMP is a set of lab measurements of the ions and proteins dissolved in blood which is often ordered as part of an annual physical or on hospital admission Here are the normal ranges for some important dissolved electrolytes measured by a CMP ion sodium potassium calcium chloride hydrogen carbonate mEq L 135 145 3 7 5 2 2 12 2 55 96 106 23 29 Suppose the smallest mass of hydrogen carbonate that can be detected by a lab is 0 1 mg What is the minimum volume of blood that must be drawn to be sure that a patient s hydrogen carbonate is within normal range Be sure your answer has a unit symbol and round it to 2 significant digits H

Measuring percent dissolved oxygen DO in an

The problem here is that your topic is exactly the same as a paper that has already been written you have actually cited the paper here Your topic needs to be novel as the idea is to write an original paper rather than re iterate what someone else has already written You want to pick a topic on which there has been some research but for which there has not yest been a summary analysis interpretation of that body of research so that you can explain what has been going on in that field

Which characteristics define a chordate View Available Hint s O The development of an anus from the blastopore O The ability to live on land O The presence of a well developed circulatory system O The presence of four specific morphological traits

Colonies of this organism have blueish green color cup fungi O yeasts Penicillium amoebas Rhizopus

This single celled protist moves by means of flagella amoebas diatoms yeasts Oeuglenoids paramecium

Which of the following is true about fungi Select all that apply they are multicellular they have cell walls made of chitin they are prokaryotes they are heterotrophs they produce spores to reproduce

Energy and matter are recycled in an ecosystem such that NPP GPP respiration photo synthesis C fermer tation

A Energy and are recycled in an ecosystem such that NPP GPP respiration matter B sugar C light

A To study energy dynamics in a terrestrial ecosystem one could create a n with brussel sprouts and a caterpillar larvae The mass of each could be measured for changes that would reflect a change in NPP open system B dessication chamber C artificial ecosystem

strial To study energy dynamics in a ter ecosystem one could measure the change in mass of brussel sprouts and caterpillar larvae a controlled environment The system will ecome unsustainable if the larvae continue to and the brussel sprouts don t grow lose mass B gain mass C have a negative NPP

One challenge with experimenting on plants to study energy dynamics in a terrestrial ecosystem is that it is hard to measure changes in biomass without plant

Some of the gross primary productivity of producers will be lost to before secondary consumers access the energy A herbivores C plant cellular respiration B plant photosynthesis D detritovores

is the total energy generated at the producer trophic level

Decomposers recycle nutrients from consumers and to make them available for producers again A primary carnivores C secondary producers B primary consumers D primary producers

decreases at each trophic level as you move up the energy pyramid A Gross secondary productivity C Net primary productivity B Gross primary productivity D Net primary consumption

In there is movement of energy and nutrients from one trophic level to another A a producer community C a consumer community B a food chain D an organism

Sketch the molecules ATP DNA and phospholipids

Which of the following is NOT a BIOTIC factor considered when studying an ecosystem A soil pH C dead leaves B pathogen density D microbe density

Which level of the biological hierarchy considers only the organisms present A community C biosphere B population D ecosystem

Which of the following is present within a known biosphere A mantle of the earth C ionosphere B arctic tundra D deep space

hy did Austria Hungary dedare war on Serbia Austria Hungary was determinted to have a war against Serbia regardless Serbia met their demands Serbia didn t own up about its participation in the killing of the Archduke Francis Ferdinand O Serbia tried to ally with Russia for protection All of the choices

The main growth factors that regulate the check points of the cell cycle are A hormones C pheromones B structural proteins D neurological signals

Which of the following is NOT an example of passive immunity A Helper T cell antibodies B breastmilk antibody transfer C placental antibody transfer D vaccination

Which of the following is NOT involved in active immunity A epidermis B T cells C B cells D antigens

A In this neuron structure 1 is the and structure 3 is the which transmits the nerve signals dendrite B cell body 2 1 C 3 axon

Question 2 of 25 In E coli bacteria the lac operon contains genes that code for enzymes that break down lactose Which statement describes when the genes in the lac operon are expressed A They are expressed whether or not there is lactose in the bacteria s environment B They are expressed when lactose is unavailable in the bacteria s environment C They are expressed when there are high levels of lactose in the bacteria s environment D They are expressed when the bacteria make lactose inside their cells SUBMIT

Question 3 of 25 Insulin is a protein that is modified and packaged in a vesicle before being released into the body In what structure does this happen O A Ribosome OB Golgi apparatus C Nucleus OD Endoplasmic reticulum SUBMIT

Singe cell migration Collective cell migration Ameboid movement Mesenchymal movement Chemotactic response Haptotactic response Chemokinesis FCM

Select ALL of the following that are TRUE regarding control of cell division The joining of specific cyclins and Cdks initiates the steps needed for cell division The G1 checkpoint ensures that all DNA is replicated and damaged DNA is repaired or else the cell cannot continue replicating When the area of the membrane becomes inadequate for nutrient exchange that acts as a Go signal for replication to occur The G2 M checkpoint is the most important checkpoint Cells that do not pass it exit the cell cycle and enter GO phase

Which of the following is NOT one of the concepts of the cell theory All organisms are structurally made of one or more cells All cells are able to move and divide throughout their life Cells can only arise from other cells The functions of an organism depend on the functions of its cells

Select ALL of the following that are TRUE of Physiology It requires the understanding of basic physical and chemical principles It is the study of the structure of of body parts It often focuses on the cellular and molecular level Its subdivisions are based on organ systems

Which of the following is NOT a role of cell adhesion molecules CAMS assist in the movement of cells past one another attract white blood cells to areas of injury or infection anchor cells to each other attract and bind ligands such as hormones

Match the membrane transport process with its description Osmosis Simple diffusion Facilitated diffusion 1 Passive process used to transport large or polar molecules across the membrane using channels or carrier proteins 2 3 Passive process in which a solvent diffuses through the membrane down its concentration gradient Passive process in which lipid soluble or very small molecules diffuse through the membrane down their concentration gradient

Listen Match the event with the phase of mitosis that it occurs in The chromosomes decondense to form chromatin and the nuclear envelope begins to form The individual chromatids separate and move to opposite poles of the cell The DNA condenses into chromosomes and the nuclear envelope disappears The microtubules of the mitotic spindle align the chromosomes in the center of the coll 1 Anaphase 2 Metaphase 3 Prophase 4 Telophase

Listen Match the type of endocytosis with its description Receptor mediated endocytosis Pinocytosis Phagocytosis 1 Engulfed molecules bind to receptors before endocytosis occurs Endocytosis of relatively large or solid material 3 Endocytosis of extracellular fluid 2

Which of the following is NOT a function of the smooth endoplasmic reticulum steroid based hormone synthesis breakdown of stored glycogen to form free glucose protein synthesis in conjunction with ribosomes lipid metabolism and cholesterol synthesis

Which of the following is FALSE regarding proteins Proteins consist of many amino acids linked by peptide bonds All proteins have primary secondary tertiary and quaternary structure Fibrous proteins are structural molecules while globular proteins are functional molecules Proteins are the basic structural material of the body and play many vital roles in cell function

Choose whether each property listed on the left is true for DNA or RNA A double stranded helical DODDE molecule A single stranded molecule Utilizes the nitrogenous bases A G C and U Found in the nucleus Utilizes the nitrogen bases A G C and T Mostly found outside of the nucleus 1 DNA 2 RNA

Listen In a tissue that is subject to a great deal of mechanical stress like the muscle cells in between the individual cells of the your heart you would expect to see tissue gap junctions tight junctions connexons

Match the term with its definition 7 Atoms Matter Elements Mass 1 Pull of gravity on mass 2 3 4 Building blocks that give an element its unique physical and chemical properties Equal to the amount of matter in the object 5 Unique substances that cannot be broken down into simple substances by ordinary chemical methods Anything that has mass and