Why is it inportant to the mouth and stomach are near the start of the digestive system

What role do bacteria play in the carbon cycle

How had the study of mitosis affected scientists knowledge of cancer

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.