Chapter 23 biology section 23.1

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The origin of species

Speciation

the formation of new species as a result of evolution

Species

(biology) taxonomic group whose members can interbreed

Sympatric

(of biological species or speciation) occurring in the same or overlapping geographical areas

Distinctiveness

a distinguishing trait

No

Can scientist distinguish all species by sight?

Subspecies

variations of a species that live in different geographic areas

Gene pool

all of the alleles in all the individuals that make up a population

Biological species concept

a species concept defining a species as a population or group thereof whose members potentially interbreed and produce fertile offspring

Ernst Mayr

coined "biological species concept"

No

Under normal condition different species interbreed?

Reproductive isolating mechanism

Any structure or function that is genetically determined and prevents interbreeding between organisms

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