Which of the following is not one of the major plant hormones?
A. auxin
B. ethylene
C. calcitonin
D. gibberellic acid
E. abscisic acid
C
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What is the advantage of having grape-like clusters called alveoli as part of the respiratory system?
A) Alveoli allow for an increase in surface area, which maximizes gas exchange. B) Alveoli are circular in structure, which is ideal for maximal gas exchange. C) Because alveoli have thinner walls, gas exchange in the lungs is facilitated. D) The grape-like shape of alveoli allows capillaries to be in closer proximity to gases.
Amphibians evolved from
A. bass and bluegill. B. sturgeon and catfish. C. lobe-finned fishes with lungs. D. sharks. E. darters.
Why do humans born without sweat glands usually not survive?
A) Sweating is important for eliminating impurities from the body. B) Sweating is the only way the body eliminates excess water. C) Sweating is an important mechanism for maintaining the correct body temperature. D) Sweat glands create openings in the skin where gas exchange occurs.
Using a microscope, you observe an amoeba moving toward a food source. This is an example of
A. reproduction.
B. cellular structure.
C.
| metabolism. |
D. growth.
E. responsiveness.