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Biology > Key Area 1.7- Evolution > Flashcards

Key Area 1.7- Evolution Flashcards

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1
Q

Speciation in which gene flow is prevented by a geographical barrier.

A

Allopatric speciation

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2
Q

Barrier to gene flow caused by behavioural differences between individuals.

A

Behavioural barrier

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3
Q

Group of similar organisms interbreeding to produce fertile young.

A

Biological species

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4
Q

DNA sequence that lowers survival rate.

A

Deleterious sequence

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5
Q

Natural selection that tends to favour an extreme value of a varied characteristic.

A

Directional selection

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6
Q

Natural selection that favours two different values of a varied characteristic.

A

Disruptive selection

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7
Q

Barrier to gene flow caused by ecological preference differences between individuals.

A

Ecological barrier

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8
Q

Changes to organisms over time that are mainly caused by natural selection.

A

Evolution

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9
Q

Random changes to DNA sequences.

A

Genetic drift

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10
Q

Physical barrier to gene flow, such as a mountain or river.

A

Geographical barrier

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11
Q

Inheritance of genetic material within a generation.

A

Horizontal inheritance

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12
Q

Region in which frequent interbreeding between two species occurs.

A

Hybrid zone

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13
Q

Process that ensures survival of the fittest.

A

Natural selection

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14
Q

Natural selection of characteristics that increase reproductive success.

A

Sexual selection

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15
Q

Evolutionary process by which new species are formed.

A

Speciation

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16
Q

Natural selection that favours a middle value of a varied characteristic.

A

Stabilising selection

17
Q

Behavioural or ecological barrier to the flow of genes.

A

Sympatric barrier

18
Q

Speciation in which gene flow is prevented by ecological or reproductive barriers.

A

Sympatric speciation

19
Q

Inheritance of genetic material from parents by offspring.

A

Vertical inheritance

20
Q

Has genetic material enclosed in a protein coat.

A

Virus

Biology (12 decks)

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