Calculate how much DDT you would consume if you ate 3 kg of squid (calamari).

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.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Which describes a grizzly bear’s habitat?