The human endoskeleton is composed primarily of
a. calcium, iron, and collagen.
b. elastin, calcium, and phosphorus.
c. myosin, actin, and calcium.
d. myosin, actin, and phosphorus.
e. collagen, calcium, and phosphorus.
E
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What is thought to be responsible for the worldwide deaths of corals and their endosymbiotic algae?
a. ocean acidification b. nitrogen fixation c. soil runoff d. declining primary productivity e. depletion of oxygen in the oceans
What is the net yield of ATP during glycolysis?
a. 2 b. 1 c. 6 d. 36 e. 4
An example of an epigenetic change is
A. a microbe secreting hyaluronidase to break down host hyaluronic acid. B. a microbe that can induce changes in host DNA, resulting in suppression of defenses or weakening of individual cells. C. a gram-negative organism releasing lipopolysaccharide from its cell wall upon lysis. D. Clostridium tetani secreting the exotoxin tetanospasmin.
According to the optimal foraging theory, a predator will select prey 1 (P1 ) over prey 2 (P2 ) when
A) E1 < E2. B) Th1 < Th2. C) E1/Th1 < E2/Th2. D) Nprey1 > N prey2.