<span>Pigeons learn to flap their wings to avoid shock more easily than they learn to peck a disk to avoid shock. they learn to flap their wings to obtain food less easily than they learn to peck a disk to obtain food.
That's what'd I'd assume the answer would be.</span>
bacteria are classified into 5 groups, spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes).
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When water evaporates, the salt is left behind. The fresh water vapor that condenses into clouds, with many of which drift over land.
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The answer is: Clonal selection produces memory cells that are long-lived and can recognize the antigen in the future.
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