What is an essential nutrient?

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 the african savanna, more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.