Answer:
Bones provide the structure for our bodies. The adult human skeleton is made up of 206 bones.
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Answer: A. Environmental drivers plus genetic variation in the population result in natural selection
Explanation: over geological time environmental conditions change. Organisms do not survive in one environmental niche with traits adapted to a possible future change that might suit those traits. Adaptation is not a matter of choice: adapt if possible or go extinct.
There is a (badly named) concept called pre-adaptation, which is that variations in some existing trait render adaptation to a different environment more likely.
Answer:
Small cells have a smaller surface to volume ratio than longer
I think the answer is A or D
