Answer:
In general, negative selection eliminates from the population very harmful changes to proteins that kill or stop reproduction. ... The authors also found a correlation between genes predicted to be under negative selection and genes implicated in certain hereditary diseases
Explanation:
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Answer: Some mammals live in water all have hair or fur.
Explanation:
Phospholipid can occur in a polar cell.
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Answer:
for testing differnt cures on animals
Explanation: