Ascientist tries to mate the two similar-looking fruit flies drosophila melanogaster and drosophila simulans. he finds that they are unable to produce viable offspring. what kind of evolutionary barrier could this be?

a. chromosomal
b. postzygotic
c. physical

Apart of an ecosystem that can restrict the growth of a population is referred to as

Which coal field location is related to coal fields in the eastern united states and supports the theory of continental drift? eastern india southern africa western australia northern south america

Producing disposable grocery bags consumes resources. recycling disposable bags is a solution that can recover some of the resources used to make new bags. which of the following behaviors could further refine the solution? a. disposing of bags by burning them b. reusing bags whenever possible c. using bags at once so that they do not break d. using only nonrenewable materials to make new bags subject is environmental science for apex users