Darwin

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Darwin

Key Terms

Speciation

Evolutionary process by which new biological species arise.

Divergence

The splitting of one species into two or more species.

"Ladder of evolution"

The fact that organisms are always getting better and being more fit for their type of envirnment

Natural Selection

Greater reproductive success among particular members of a species arising from genetically determined characteristics that confer an advantage in a particular envirnment.

Variation

Genetically determined differences in the of characteristics of members of the same species.

Fossils

Any evidence of ancient life.

Mutation

A permanent change in the genetic material, usually in a single gene.

Species

In general, a group of organisms which can potentially breed with each other to produce fertile offspring and cannot breed into members of other groups.

Evolution

Change in the hereditary characteristics of groups of organisms over the course of generations.

Misconceptions

Religion and science explain completely different things

Evolution is observable and testable therefore it is science.

Just because not a lot of fossils are not found, doesnt mean there is no evolution.

Evolutionary theory is how life changes after its orgin

Oraganisms are getting better for their enviornment

What led to his discovery?

Forced to spread his ideas before Wallace takes credit

Each islands finches were different--> "survival of the fittest"

Studied finches and realized that they were similar to species 400 miles away

Studied species in Galapagos islands

No humans lived there so animals were not afraid-->close observations

Went in the voyage of Beagle for 5 years