The size of a food web is limited by the number of

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

Does mitochondria still meet the definition of a eukaryote why or why not?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?