Evolution

Convergent

Common features in animals which have not had a common ancestor

Coevolution

When two different organisms impact each others evolution

Punctuated Equilibrium

Long periods of time without change and then a sudden spike of change.

Divergent Evolution

When two animals from a common ancestor evolve to have different features

Gradualism

When species gradually evolve over time.

Darwins Theory of Evolution

Darwin believes that all life on Earth is connected and that organisms evolved because of natural selection

Charles Lyell

Uniformatism

The same processes that took place years ago took place now. The Earth is very old.

Lamarck

Thought use.misuse of a body part caused it to grow or disappear

Malthus

Argued that population growing unchecked would lead to starvation and death

Hutton

Thought the Earth was millions of years old

Cuvier

Species evolve after disasters

4 conditions for natural selection to occur

1. Variation: Individuals in a population must have different traits.
2. Overpopulation
3. A disadvantage of a variation

Evidence of Evolution

fossil, homologous,analogous, biogeography, vestigial,embryology, macromolecule