Meiosis is a type of cell division that produces gamete cells, each with half the number of chromosomes as the parent cell. One way that genetic variation is increased during meiosis is through
, in which genes separate from one another during gamete formation.

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water