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Vasocontriction and Vasodilation

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Question

According to the passage, fleas are resistance to sprays and chemical because they __________________.

A

have waterproof sclerites

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B

are excellent jumpers

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C

reproduce very rapidly

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D

can stick to fur like velcro

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Solution

The correct option is A have waterproof sclerites
Since we know that the exoskeleton on a flea is called a sclerite, we can infer that the sclerite is waterproof, which makes fleas resistant to sprays and chemicals.

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