Answer;
-Gene flow
Explanation;
Microevolution is the changes within a gene pool occurring from generation to generation. Allele frequencies in a population may change due to gene flow, genetic drift, natural selection and mutation.
Gene flow refers to changes in allele frequency that result from migration of individuals between populations. Gene flow has the effect of minimizing the genetic differences between populations.
It is answer A, the hippo is not benefitting from the catfish, therefore it is not mutualism.
Engineering should be the answer because to create a great experiment, it has to be well put together.
I would say that "any more" has to do with quantity (would you like any more bread?), and "any longer" with time or duration (we are not friends any longer, although I believe it would be also correct to say "any more" in this case).
Active transport is a process requiring energy in which a substance crosses the cell membrane. When the nerve cell is in its resting potential, there are the positively charged sodium ions and the negatively charged potassium ions. During depolarization, the neuron fires, wherein the active transport plays its role: the positive ions are forced in and the negative ions are forced out. When depolarization is done, these ions are again back to normal through active transport.<span>
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