Where are choanocytes found?
a. in humans
b. in birds
c. in earthworms
d. in sponges
Ans: d. in sponges
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Sister chromatids separate during
A. prophase of meiosis I. B. metaphase of meiosis I. C. metaphase of meiosis II. D. prometaphase of meiosis I. E. anaphase of meiosis II.
Which is a benefit of living in a group? a. Cooperative response to an attack
b. Ability to mount a more formidable defense. c. More eyes to watch for predators. d. All of these choices. e. More individuals who can help counterattack a rival group.
The ultimate source of all energy in a
terrestrial ecosystem is a. the organic matter in all the organisms of the ecosystem. b. electrons from water molecules. c. sunlight. d. ATP. e. inorganic mineral ions in the soil.
Xylem transports water and dissolved nutrient minerals in which direction?
a. upward b. downward c. inward laterally d. outward laterally e. both upward and downward