The tunica externa (New Latin "outer coat"), also known as the tunica adventitia (New Latin "additional coat")(or adventitia for short), is the outermost tunica (layer) of a blood vessel, surrounding the tunica media. It is mainly composed of collagen and, in arteries, is supported by external elastic lamina.
All living thing break down water to make energy.
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C. The population of mice would decrease.
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Answer:
Eri silkworm and Seri silkworm
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