Genes and Variations

The differences among a species, like different bird beaks, are called

• genes.

• variations.

• traits.

• theories.

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These moths are all the same species. The differences between their wings is an example of ________________

• Natural Selection

• Variation

• Homeostasis

• Extinction

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Which of the following means "genetic change over time"

• natural selection

• speciation

• evolution

• fitness

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These cause variations.

• mutations

• adaptations

• a desire to change

• injuries

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A slight difference in an inherited trait between individual members of the same species.

• variations

• adapatations

• homologous structures

• analogous structures

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The discovery of DNA and genes proved that

• Darwin was wrong

• mutations create variations and come from genes

• we are all the same species

• bats and butterflies have a very close common ancestor

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What is it called when humans decide which traits of an organism are the most desirable and only allow those organisms with the specific, desired traits to breed.

• biological evolution

• evolution by natural selection

• artificial selection

• inbreeding

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An inherited trait that increases an organism's chance of surviving and reproducing.

• variation

• adaptation

• vestigial structure

• mutation

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When an organism of a species is born with a variation in a trait that gives it an advantage in its environment, we call that trait an adaptation.

• true

• false

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differences in inherited characteristics between parent and offspring

• genetic variation

• genotype

• alleles

• phenotype

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