Which of the following is true of a retrovirus but not of the Alu retrotransposon?

(a) It requires cellular enzymes to make copies.
(b) It can be inserted into the genome.
(c) It can be excised and moved to a new location in the genome.
(d) It encodes its own reverse transcriptase.


(d)

Biology & Microbiology

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The deepest, most fertile topsoil is usually in:

a. deserts b. savannas c. temperate grasslands d. temperate forests e. tropical rain forests

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Drugs, such as cocaine and nicotine, mimic the action of neurotransmitters

a. True b. False

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Secretion occurs mainly in the:a

distal convoluted tubule. b. loop of Henle. c. proximal convoluted tubule. d. collecting duct. e. glomerulus.

Biology & Microbiology

Which of these lines represents the pattern of change in mass over that time?

A) A B) B C) C

Biology & Microbiology