Which of the following parts of an amino acid vary among different amino acids?

A. the carboxyl group
B. the side chain, or R group
C. the amino group
D. the hydrogen on the central carbon


Ans: B. the side chain, or R group

Biology & Microbiology

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__________ species of many plants (and a few

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Adult tunicates resemble __________ and are __________

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What is the primary purpose of a fruit?

A. to feed the growing embryo of the plant B. to reward animals for pollination C. to distract predators from the main plant D. to disseminate seeds

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