Evolution

Scientific theories are based on

• general assumptions of how systems work.
• mathematical principles that can be proven true.
• large amounts of data collected over time.
• observations from within only one scientific discipline.

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Which of these explain how a natural phenomenon works or happens?

• theory

• law

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Which of these describes a natural phenomenon or relationship that always occurs under specific conditions

• theory

• law

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When trying to determine whether or not organisms share a common ancestor, what evidence could scientists examine?

• Metamorphic Rocks

• Homologous Structures

• Plate Tectonics

• Natural Selection

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Ostrich wings are examples of

• homologous structures
• vestigial structures
• adaptations
• traits

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Dolphins have the same arm structure as wolfs, what type of evidence for evolution does this represent?

• DNA
• vestigial structures
• homologous structures
• embryology

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Change over time is

• evolution
• generation
• growth
• biogenesis

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What type of selection is being shown in the image?

• sexual selection

• natural selection

• artificial selection

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What type of selection is being shown in the image?

• sexual selection

• natural selection

• artificial selection

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The principles of Natural Selection state that all populations have ______________ variation.

• phenotypic

• obvious

• genotypic

• minimal

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