Best Answer: well, organisms of the same genus have very similar characteristics... so its easier for scientists to infer something about one species when they have another species classified as very similar.<span>
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Continual questioning of observations.
Answer:
Robertsonian translocation
First four are made of rock and rest are made of gases.
Atmospheres of all the planets are made of gases.
I think the answer is 100 per so C. hope it helps hanna