The ability of animals to adjust to seasonal changes in temperature is called:a
acclimatization.
b. estivation.
c. homeostatic adjustment.
d. torpor.
e. hibernation.
A
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Glucose diffuses slowly through artificial phospholipid bilayers. The cells lining the small intestine, however, rapidly move large quantities of glucose from the glucose-rich food into their glucose-poor cytoplasm
Using this information, which transport mechanism is most probably functioning in the intestinal cells? A) simple diffusion B) phagocytosis C) active transport pumps D) exocytosis E) facilitated diffusion
Which of the following characterizes parthenogenesis?
A) An individual may change its sex during its lifetime B) Specialized groups of cells grow into new individuals C) An organism is first a male and then a female D) An egg develops without being fertilized E) Both mates have male and female reproductive organs
Cross-bridges form between the contractile proteins of the muscle cell. The movement of cross-bridges shortens the muscle fiber. What two proteins participate in cross-bridge formation?
A. actin and myosin B. troponin and titin C. titin and myosin D. titin and actin
The structure labeled "B" in the figure is a(n)
a. asexual spore. b. haploid spore. c. zygospore. d. gamete. e. spore sac