Which characteristic defines a virus?

a. Viruses cannot replicate.
b. Viruses cannot metabolize.
c. Viruses contain both RNA and DNA.
d. Viruses have various morphologies.
e. Viruses are very tiny cells with nuclei.


b

Biology & Microbiology

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Which zone does not occur in the sandy beach?

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When energy captured by antenna pigments of LHCII is funneled to the reaction center it changes the reduction potential of a P680 chlorophyll a molecule to ________, making it a better electron ________

A) ?0.80 V; donor B) ?0.80 V; acceptor C) +0.80 V; donor D) +0.80 V; acceptor E) None of the above are correct.

Biology & Microbiology

Refer to Figure 42-2. When an electrical impulse travels along the neuron labeled 2:

a. the hand will be extended. b. the hand will be withdrawn. c. the fingers will flex. d. the fingers will extend. e. the hand will remain stationary.

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Organize the sequence of structures through which sperm must pass upon ejaculation

1) urethra 2) ejaculatory duct 3) epididymis 4) vas deferens a. 3 ? 2 ? 1 ? 4 b. 3 ? 4 ? 2 ? 1 c. 2 ? 3 ? 4 ? 1 d. 2 ? 4 ? 3 ? 1 e. 4 ? 3 ? 2 ? 1

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