51. Which of the following is NOT a physical change

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.

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Name the organs of humanelemintary canal.