Before you perform an experiment, which variable should you already know? A. A distant variable B. A manipulated variable C. A responding variable D. An experimental variable

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.

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

Which characteristics are typical of a human population in the postindustrial stage?