Where are choanocytes found?

a. in humans
b. in birds
c. in earthworms
d. in sponges


Ans: d. in sponges

Biology & Microbiology

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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.

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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.

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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.

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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

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