AP BIOLOGY

Detailed explanation-1: -Fertilization is external in most fish species. Large quantities of eggs and sperm are simultaneously released into the water by females and males. This process of egg release is termed spawning..

Detailed explanation-2: -They do it by releasing eggs or sperm into the water, in the hopes that the cells will find each other and the eggs will be fertilized. Most aquatic organisms that reproduce sexually use this method of fertilization. Because it happens outside of the body, we call this “external fertilization”.

Detailed explanation-3: -Fertilization may be external or internal. In the yellow perch, eggs are produced by ovaries in the female and sperm is produced by the testes, and they are released through an opening into the environment, and fertilization takes place in the water (Towle 1989).

Detailed explanation-4: -After the sperm reaches the egg, fertilization can then take place. Most external fertilization happens during the process of spawning where one or several females release their eggs and the male(s) release sperm in the same area, at the same time.