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
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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
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
The fungal cell membrane component that is targeted by many anti-fungal drugs is:
A. Cholesterol B. Teichoic acid C. Ergosterol D. Peptidoglycan
The human embryo's first blood cells arise in the
A) developing liver. B) developing bone marrow. C) yolk sac. D) allantois.