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Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.
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Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism
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What causes darkening of the skin as melanin production increases
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What impact does the atmosphere have on Earth’s cycles...
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