Why do humans and whales share body structure

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.

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere

What must be done to breed dogs for a partical trait