Ch 7 L 1: Darwin's Theory

A trait that helps an organism survive and reproduce

• Adaptation

• Variation

• Allele

• Species

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The theory of natural selection was introduced by

• Gregor Mendel

• Sir Isaac Newton

• Charles Darwin

• Copernicus

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What is the theory of natural selection?

• The practice by which humans select plants or animals for breeding based on desired traits.

• An inherited trait that helps an organism to survive.

• Differences in traits

• individuals that are better adapted to their environment are more likely to survive and reproduce

What organism did Darwin study at the Galapagos Island?

• Dogs

• Dragons

• Finches

• Tigers

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The white feathers of a snowy owl allow it to blend in with its environment during the winter months (snow). This is an example of ________________

• Species

• Adaptation

• Environmental Change

• Variation

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

• Variation

• Inheritance

• competition

• Genes

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Genetic Changes in a population over a long period of time is called:

• half-life

• evolution

• homologous structure

• All of the above

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Why are advantageous traits more likely to be passed onto offspring?

• Because they come from recessive alleles.

• Because the trait is an acquired phenotype.

• Because they come from dominant alleles.

• Because they are more likely to survive and reproduce

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