The guard at the entrance of a building is like the of a cell.

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 how ancient whale fossils found in eqypt are believed to support the theory of evolution.

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities