Genetic variation<span> is essential for </span>natural selection<span> because </span>natural selection can only increase or decrease frequency of alleles that already exist in the population.Genetic variation<span> is caused by: mutation
i pulled this off of the site i got the information from i hope this helps you out if not sorry
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Answer:
idc
Explanation:
i dont understand bc i dont have this class
they are layered mounds of deposits made by precambrian algae
Answer:
FALSE MY GOOD SIR!!
Explanation:
It was once considered algae but it has been reclassified based on recent research.
Answer:
Melting mountain glaciers
Explanation:
This is the answer because some of our fresh water is in ice caps/glaciers so we will loose fresh water and we will not have fresh water to drink so the planet earth will not have water.
