Examples of external fertilization can be seen in frogs, some marine invertebrates and many types of fish. External fertilization happens when sperm fertilize eggs outside of the body of the female animal. Often, in orde... More »

Animals that live in water, such as amphibians and fish, use external fertilization. The term refers to the process by which the egg is fertilized by the sperm in an open environment and not within the bodies of the orga... More »

The difference between internal and external fertilization is that internal fertilization occurs inside the body, whereas external fertilization happens outside the body. Fertilization is the process by which a sperm cel... More »

The difference between internal and external fertilization is that internal fertilization occurs inside the body, whereas external fertilization happens outside the body. Fertilization is the process by which a sperm cel... More »

After fertilization, the cells in the zygote divide rapidly to form a morula, which becomes the embryo after approximately five days. The fetus is present about eight weeks after the fertilization takes place. More »

Animals that live in water, such as amphibians and fish, use external fertilization. The term refers to the process by which the egg is fertilized by the sperm in an open environment and not within the bodies of the orga... More »

A coral reef's food chain starts with algae that produce food from water, carbon dioxide and sunlight, which are eaten by microscopic organisms, invertebrates, fish and turtles, which are eaten in turn by predators. All ... More »