Can evolution by natural selection be witnessed and quantified?
2 answers:
No it cannot be witnessed as it happens over million of years and these changes only occur if they are beneficial for the survival of the species.
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Answer:
convex lens
Explanation:
because when parallel rays of light pass through a lens are brought together through a lens
Gametogenesis produces human egg and sperm cells
The answer is C: a pollutant.
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