D. Is the answer you are looking for, because the new bacterium is almost always the same as the parent. Answer D. Is not true.
A. Genetic Drift.
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Answer:
Hardy Weinbergs equilibrium(HWE) states genetic variation in a population will remain constant in disturbing factors absence. It also talks about the sum of frequency of both alleles being 100 percent.
In the sample given above the total s of individuals is 2,000. The result of MM+MN+NN (1,600+250+150) gives 2,000 which is a 100 percent and satisfies Hardy Weinbergs equilibrium
cold and made of ice
the water was over 0 degrees celceus