Natural Selection and Darwin's Observations

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

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.

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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