What endogenous process helps plants to keep their movements and other responses synchronized with the environment?

A. gravitropism
B. purine monitoring
C. solar tracking
D. a circadian clock
E. auxin cycling


Answer: D

Biology & Microbiology

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For animals, the final hydrogen acceptor in

cellular respiration is a. NADP+. b. sulfur. c. oxygen. d. magnesium. e. phosphorus

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High-density lipoproteins (HDLs) deposit cholesterol on the endothelial surfaces of blood vessels and contribute to atherosclerotic plaque formation.

a. true b. false

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All of the following contain amino acids except:

What will be an ideal response?

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What makes each amino acid unique?

A. the central carbon B. the R group C. the carboxyl group D. the carbon ring E. the amino group

Biology & Microbiology