Evolution and Population Genetics

Natural selection is the process by which

• change occurs in the genetic characteristics of individuals that live together in an environment from one generation to another
• organisms with traits well-suited to their environment reproduce at a greater rate than less well-adapted organisms in the same environment
• use and disuse of a characteristic leads to evolutionary change
• baseball players pass on the trait for strong arm muscles to children

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Mutations are a change in what?

• DNA
• tRNA
• genotype
• phenotype

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Change over time is

• evolution
• generation
• growth
• biogenesis

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In natural selection, the selective agent is the

• humans
• mutations
• breeders
• environment

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a bird that can easily outcompete other birds for food and that can produce many eggs has a high

• sexuality
• mutation rate
• fitness
• adaptability

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Which of the following is a term for a group of similar organisms that can reproduce fertile offspring?

• individual
• population
• species
• fossil

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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)

• change
• adaption
• species
• variation

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Over time, adaptions can lead populations to experience 

• environmental changes
• genetic changes
• geological changes
• extinction

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Which of the following describes natural selection?

• it acts on genetic material directly

• it acts on existing physical traits

• it forms new traits

• it forms new genetic material

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Two organisms that are closely related would have

• very similar DNA sequence
• exactly the same DNA sequences
• no proteins in common
• completely different DNA sequence

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