Your answer is D
Gravel sized particals
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D because it states that alternate version of genes could cause variations
Filled with living things in it
Answer:
Is the Atmosphere always the same? Explain. No, it is Constantly changing w/ Gases Moving in and out of Living things, the Land and Water. ... They are Created when the Downward Force of Air is Greater than the Upward Force of Moving Air and Air Molecules.
