When one male and one female form a long-term association, the mating system is referred to as ____
a. promiscuous
b. polygamous
c. monogamous
d. polygynous
e. polyandrous
ANSWER: c
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Which of the following is NOT a function of cellular membranes?
A. selective uptake and export of ions and molecules B. cell compartmentalization C. cell signaling D. maintenance of cell shape E. cell adhesion
The concentration of oxygen is lower at high altitudes. Why would this make it harder for a person to get enough oxygen into their blood?
A. Hemoglobin cannot bind oxygen well at low concentrations. B. The concentration gradient from the alveoli to the blood decreases. C. People are working harder at high altitudes and have higher demands for oxygen. D. The concentration of oxygen in the blood is too low for diffusion into tissues. E. The heart cannot obtain enough energy to pump oxygen into the blood from the alveoli.
Which of the following is not a feature common to most animals?
a) development into a fixed body plan b) asexual reproduction c) specialized tissues d) heterotrophic nutrient sourcing
At any given time, what percentage of the body's capillaries have blood flowing through them?
A) 5-10% B) 20-25% C) 40-50% D) 85-90%