Evolution Vocabulary

a molecule that is present in all living cells and that contains the information that determines the traits that a living thing inherits and needs to live

• RNA

• DNA

• Allele

• Gene

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the death of every member of a species

• natural selection

• speciation

• evolution

• extinction

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the formation of new species as a result of evolution

• natural selection

• adaptation

• speciation

• extinction

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a group of organisms that are closely related and can mate to produce fertile offspring

• species

• family

• breed

• kingdom

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the occurrence of hereditary or nonhereditary differences between different individuals of a population

• variation

• reproduction

• frequency

• allele frequency

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The combination of inherited alleles is called a

• phenotype

• genotype

physical characteristics, such as fur color

• phenotype

• genotype

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the proportion of gene copies in a population that are a given allele, expressed as a percentage

• allele frequency

• genotype

• phenotype

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During early stages of cell division, DNA is organized into structures called

• genes

• chromosomes

• alleles

• chromatin

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the process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well-adapted individuals do; a theory to explain the mechanism of evolution

• artificial selection

• evolution

• natural selection

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