Thirty-eight because the chromosome pairs are 19 and therefore, no. of chromosome will be 38.
This is called Biomagnification - concentration of toxins in an organism as a result of its ingesting other plants or animals in which the toxins are more widely disbursed.
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B, they share similar chemical properties.
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D nitrogen-fixing bacteria in root of legumes this is an illustration of a relationship that both organisms need
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Change you AC filter, don't forget about other AC filters, check you air ducts, use cooking vents, keep your rug and carpets clean, control humidity in your home, and buy indoor plants to refreshen the air.