Mammals descended from a group of reptiles known as:

a. eutherians.
b. lancelets.
c. therapsids.
d. holothurians.
e. labyrinthodonts.


C

Biology & Microbiology

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A bone marrow aspirate is examined for the presence of parasites from a patient who has been traveling in Latin America for several months and who came in contact with a triatomid bug. Which parasite will most likely be identified?

a. Trypanosoma cruzi b. D. fragilis c. Fasciola hepatica d. Chilomastix mesnili

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Memory cells may take the form of

A. B cells. B. T cytotoxic cells. C. T helper cells. D. All of the choices are correct.

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In all animals, the largest percentage of the body's fluids are located in the:

A. intracellular compartment. B. extracellular compartment. C. interstitial fluid. D. plasma. E. hemolymph.

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Which animal would you expect to have the most diverse olfactory receptors to enhance their sense of smell?

a. dog b. monkey c. human d. angelfish e. earthworm

Biology & Microbiology