Lesson 22 Darwin and Natural Selection

Darwin developed his theory of natural selection by the studying the unique life on this chain of islands in the Pacific Ocean near South America.

• the Andouilles

• the Hawaiian Islands

• the Galapagos Islands

• the Aleutian Islands

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The finches of the Galapagos islands different in what way and for what reason?

• size of body, size of trees

• location on specific islands, amount of water

• coloration. types of predators

• beak shape, type of food available

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The difference in the physical traits of individuals within the same population is called a(n)

• change

• adaption

• species

• variation

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Darwin noticed that many organisms seemed well suited to

• being preserved as fossils.

• providing humans with food.

• surviving in the environments in which they lived.

• swimming from South America to the Galápagos Islands.

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Charles Darwin called the ability of an organism to survive and reproduce in its specific environment

• diversity.

• evolution.

• adaptation.

• fitness.

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Whales have a pelvis and femurs that are of no use to them. These are called

• examples of fossils.

• examples of natural variation.

• acquired traits.

• vestigial structures.

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An inherit characteristic that increases and organism's ability to survive and reproduce is a (n)

• vestigial structure

• speciation

• analogous structure

• adaptation

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Where the better adapted organisms survive to pass traits along to offspring.

• Evolution
• Natural Selection
• Extinction
• Artifical Selection

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

• Because they are more likely to survive and reproduce.
• Because they come from dominant alleles.
• Because they come from recessive alleles.
• Because the trait is an acquired phenotype.

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An original species from which all other species evolved.

• Fossil
• Natural Selection
• Descendant
• Common Ancestor

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