A protein inside cells that speeds up the rate of a chemical reaction is a(n) ____

a. hydrocarbon
b. inorganic compound
c. enzyme
d. buffer
e. functional group


ANSWER: c

Biology & Microbiology

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The magnitude of heritability is an intrinsic property of a trait

A. true B. false

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Which of the following tropisms is the

response to touch in plants?

a. gravitropism b. phototropism c. thigmotropism d. mechanotropism e. chemotropism

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An invertebrate is an animal that

A. does not have a backbone. B. has a backbone. C. has a complete digestive tract. D. has an incomplete digestive tract. E. does not have true tissues.

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An animal that has a high surface-area-to-volume-ratio of the body, and takes in all the oxygen it needs through its outer epithelium is most likely which of the following?

A. a fish B. an earthworm C. a mammal D. an insect E. a snake

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