Which one of the following is not one of the major elements that make up 96 percent of all

living organisms?



a. carbon
b. oxygen
c. helium
d. nitrogen


C

Biology & Microbiology

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A _______ food web has photosynthetic organisms at its base, while a _______ food web has organisms that feed on decaying matter at its base.

a. detrital, grazing b. grazing, herbivorous c. grazing, detrital d. grazing, trophic

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In the past, oxygen uptake in a patient was measured as a means of determining whether a certain endocrine gland was working properly. Which of the following glands was this method most likely assessing?

A) pineal B) thyroid C) testes D) parathyroid

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The fungal cell membrane component that is targeted by many anti-fungal drugs is:

A. Cholesterol B. Teichoic acid C. Ergosterol D. Peptidoglycan

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The human embryo's first blood cells arise in the

A) developing liver. B) developing bone marrow. C) yolk sac. D) allantois.

Biology & Microbiology