web evolution project

by: Tyler Hogue & Justin Jones

Charles Darwin

Charles Robert Darwin, FRS was an English naturalist and geologist, best known for his contributions to evolutionary theory.


Gradual change in a species through adaptation over time.

Natural Selection

Organisims with a favorable variation survive and reproduce, passing on there favorable variation onto their offspring.

Homologous vs. Analogous

Homologous structures: have the same structure but different functions- the wind of a bat and the arm of a human are homologues.Analogous: structures have the same function, but different structures- the wing of a bird and the wing of an insect are analogues

Facts about Evolution

Fossils-Evidence of common decentEmbrylogy-Study of embryosmolecular evidence-change in the sequence compisition of cellular moleculesanatomy- Study of similiarties and difference in a different speices

Survival of the fittest

Natural selection conceived of as a struggle for life in which only those organisms best adapted to existing conditions are able to survive and reproduce.

genetic diversity/variation (convergent & divergent evolution)

A species with a broad distribution rarely has the same genetic makeup over its entire range. Thats because this species is sensitive to temperature.


The action or process of adapting or being adapted. Like a spider when  it tries to hide in its web from birds.

Geographic isolation & reprodutive isolation

 Geographic isolation: represents a prezygotic barrier to reproduction, though one that, uniquely, can lack a genetic component.Reproductive isolation: the conditions, as physiological or behavioral differences or geographical barriers, that prevent potentially interbreeding populations from cross-fertilization.