Unit 6 Evolution Vocabulary

18 terms by Syed14

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Evolution

change in a kind of organism over time; process by which modern organisms have descended from ancient organisms

Theory

well-tested explanation that unifies a broad range of observations

Fitness

ability of an organism to survive and reproduce in its environment

competition

the struggle between organisms to survive in a habitat with limited resources

species

a group of similar organisms that can breed and produce fertile offspring

mutation

change in a DNA sequence that affects genetic information

fossil

the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil

Origin of species

Darwin's first book about natural selection

Galapagos Islands

Chain of islands near South America where Darwin developed his theory of natural selection by studying the unique life there.

Survival of the fittest

when orgamism fight for food and to live

common ancestor

the shared ancestor of new, different species that arose from one population

fossil record

chronological collection of life's remains in sedimentary rock layers

morphology

the branch of biology that deals with the structure of animals and plants

Charles Darwin

English natural scientist who formulated a theory of evolution by natural selection (1809-1882)

Natural selection

a natural process resulting in the evolution of organisms best adapted to the environment

adaptation

the process of adapting to something (such as environmental conditions)

overproduction

organisms produce more offspring than can survive

genetic variation

The variety of different types of genes in a species or population.

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