The theory of island biogeography states that the number of species found on a particular, undisturbed island is determined solely by the number of species immigrating to the island and by extinction rates. The theory al... More »

There are many reasons that classifying organisms is important, such as helping understand the genetic relationships between different groups and species, helping with wide studies of organisms and helping to develop new... More »

The answer to the question of whether evolution is a theory or fact is "both," and the answer to the question of whether extinction of the dinosaurs affected other species is "yes." Another question is whether the evolut... More » Science Biology

One advantage of cloning includes the protection of endangered species from extinction because the members of the species can have their cells cloned to create other members. Cloning also helps in improving food supply. ... More »

Charles Darwin is best known for establishing a theory of evolution that explains biological changes among the species of the Earth. His belief that most species evolved through the process of natural selection also made... More » Science Biology

Comparative embryology supports the theory of evolution because scientists have found that the embryos of many different species show similarities, which implies they share a common origin. For example, in humans the emb... More »

Examples of ecology topics include evolutionary ecology, behavioral ecology, population ecology, biogeography and conservation biology. Because ecology is defined as the study of the way organisms interact with each othe... More »