Evolution

The gradual change in species over time is...

• Evolution
• Nucleotide 
• Adaptation
• Natural Selection

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Darwin wrote that organisms with traits that are best suited to the environment will ________________

• increase in number
  
• become extinct
  

What characteristic did Darwin observe about the finches on the Galapagos Islands?

• Their feathers 
• Genotypes 
• Their beaks
• Their body sizes

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The natural differences between individuals of a species is called ___________.

• adaptations
• natural selection
• variation
• fitness

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What is the advantage of having different shaped beaks?

• To look different from other species.
• To be able to eat the food readily available in the environment.
• To protect itself against predators.
• To protect itself against prey.

The struggle for existence against other members of an organisms species is

• Competition
• Natural Selection
• gene flow
• genetic drift

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Darwin's expedition was called the Voyage of the _________.

• Titanic
• Beagle

Remains of ancient organisms are called

• Extinctions
• Fossils
• Mutations
• Variations

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This picture is best known as

• homologous structures
• analogous structures
• vestigial structures
• embryology

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What do phylogenetic trees do?

• Help you visualize how species are related.
• Provide windbreaks in your yard.
• Provide DNA details.
• Show the distribution of organisms

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