When an organism joins a new population, its genes become part of the new population’s gene pool. How does this gene flow affect populations? Gene flow between populations has no effect on the gene pool.

Gene flow between populations increases genetic diversity over time.

Gene flow between populations decreases genetic diversity over time.

Gene flow increases the chance for reproductive isolation which can cause new species to form.

well the answer is 2!

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )