Natural Selection and Evidence

This scientist came up with the idea of natural selection.

• Jean Baptiste Lamarck
• Gregor Mendel
• Charles Darwin
• Thomas Malthus

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Inherited trait that helps an organism survive is a(n) __________.

• Fossil
• Adaptation
• Ancestor
• Natural selection

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Survival of the fittest or when favorable adaptations reproduce faster is called what?

• Evolution
• Adaptation
• Natural selection
• Fossilization

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Structures with the same parts have different functions; suggests that organisms share a common ancestry

• vestigial structures
• homologous structures
• adaptive radiation
• fossil

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Which of the following is an example of a vestigial structure?

• the wings of a red-tailed hawk
• the hind limbs of a house cat
• the fins of sharks
• the tailbone of a human

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What do we call a change in a species over time?

• Adaptation

• Evolution

• Extinction

• Environmental influences

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Ostrich wings are examples of

• homologous structures
• vestigial structures
• adaptations
• traits

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Why do embryologist study embryos?

• to see if they are related
• to understand adaptations
• to determine the age
• to learn what parents are vestigial

What is embryology?

• the age of organisms
• the oldest stage of development
• the life span of an organism
• the earliest growth stage of development

Two organisms that are closely related would have

• very similar DNA sequence
• exactly the same DNA sequences
• no proteins in common
• completely different DNA sequence

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