Hello friends how is lockdown

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.

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?