Chapter 24 Flashcards

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1
Q

One species splits into two or more species

A

Speciation

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2
Q

Broad pattern of evolution above species level

A

Macroevolution

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3
Q

Group of populations whose members have the potential to interbreed in nature

A

Species

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4
Q

Offsprings that result from an interpsecific mating

A

Hybrids

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5
Q

Prevents fertilization

A

Prezygotic barrier

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6
Q

Happens after zygote is formed

A

Postzygotic barrier

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7
Q

Each species occupies a specific niche

A

Competitive exclusion principle

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8
Q

Breed during different times, seasons, temperatures

A

Temporal isolation

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9
Q

Courtship rituals are unique to a species

A

Behavioral isolation

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10
Q

Mating is attempted but have morphological differences

A

Mechanical isolation

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11
Q

Sperm of 1 species may not fertilize the other

A

Gametic isolation

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12
Q

Genes may interfere with hybrid development

A

Reduced hybrid variability

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13
Q

Hybrids are sterile

A

Reduced hybrid fertility

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14
Q

May be fertile at first then offspring are sterile

A

Hybrid breakdown

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15
Q

Population forms new species while geographically isolated

A

Allopatric

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16
Q

Subset of a population forms without a geographic isolation

A

Sympatric

17
Q

Region in which members of different species meet and mate, producing offspring of mixed ancestry

A

Hybrid zones

18
Q

Long periods of no or little change in the species then sudden changes

A

Punctuated equilibria