Evolution & Pop Genetics Unit Review

What is the term for a trait that allows an organism to survive better in its environment?

• variation

• adaptation

• homologous structure

• vestigial structure

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The combined alleles of all individuals in a population is called

• phenotype
• gene pool
• gene flow
• allele frequency

The connection between fitness and adaptation is --

• fitness leads to the formation of an adaptation

• adaptations lead to fitness

• an organism must be "fit" to develop an adaptation

• there is no connection

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Which one INCREASES genetic variation in a population?

• genetic drift

• bottleneck effect

• gene pool

• gene flow

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The difference in the physical traits of an individual from those of other individuals in a group is called a(n) --

• genotype

• mimicry

• mutation

• variation

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Over time, adaptations can lead populations to experience --

• environmental changes

• genetic changes

• geological changes

• extinction

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What did Charles Darwin observe in finch populations of the Galapagos Islands?

• different species were adapted to specific islands

• all 13 species adapted to all of the islands

• most species lived on the main island

• the same finch species were found in other parts of the world

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In natural selection, the selective agent which determines who survives is --

• humans

• mutations

• homologous structures

• environment

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All of the cottontail rabbits living in a particular area (such as Plano, TX) would be an example of a(n)

• population
• species
• homologous structures
• individual organism

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The ability of the cottontail rabbits living in a particular area to survive and reproduce would be called --

• artificial selection

• speciation

• fitness

• descent with modification

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