What are the five theories of evolution of life?

Answer 1

There is only one evolutionary theory in Biology. It is the population genetics model that explains the emergence of new species as the result of reproductive variation, genetic divergence and differential reproductive success.

Answer 2

Darwin's theory of evolution, is the most generally known theory and it was the only one accepted in the scientific world for decades. It is based around the concept that members of a species that had traits that allowed them to better survive their ecosystem would breed and produce offspring that would also have those traits, while members of the species that didn't have these traits would eventually die out.

For example, let's say there was a species of seals that were consistently hunted by sharks. Most of the seals could swim at a medium speed, but a handful were exceptionally fast swimmers, and another handful were very slow. The sharks would easily be able to catch slower seals, but the faster seals would be much more difficult to snare. So while the group of slower seals would eventually die out because so many were being eaten by the sharks, the faster seals would mate with each other and produce more fast seals. These fast seals, after millions of years, will become a separate species altogether, while the medium swimming seals are still what they always were, and the slow swimming seals have died out. Eventually, a species of carnivores that can blend in well with their surroundings will come along and start to hunt the fast swimming seals, and the seals with good eyesight will survive and become a new species in the same manner.

Alternative theories have been presented and dismissed or placed under further research

Answer 3

variation,competition,offspring,genetics, and natural selection.