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Evidence for Evolution
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A characteristic of different organisms that have similar function but not necessarily the same structure and did not come from the same common ancestor
Analogous Structure
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If species do not evolve, they go __________________ .
Extinct
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Give an example of human vestigial structure
Answers Vary - paranasal sinuses, wisdom teeth, tail bone, yolk sac, 3rd eyelid
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An example of a Homologous molecule
Answers vary: DNA, RNA, Protein, Cytochrome C
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The process of change in a species over time is called
Evolution
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True/False - Many animals have vestigial structures from an ancestor.
TRUE
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This is a trait that makes an organism more suited to its environment
Adaptation
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Blind cave animals that still have eyes are an example of
Vestigial structures
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This picture is showing an example of
Homologous structures
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This is the mechanism for evolution as proposed by Charles Darwin
Natural Selection
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True/False - We can observe changes in life forms by observing the fossil record
TRUE
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Overproduction, variation, adaptation, and _____________ - are the 4 conditions for natural selection to occur
Fitness
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This is the study within biology that looks at where organisms live(d) past/present
Biogeography
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The ability of an organism to survive and reproduce in its environment
Fitness
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The process by which unrelated organisms independently evolve similarities when adapting to similar environments
Convergent Evolution
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To understand evolutionary relationships, scientists these days mostly look at _____________.
DNA
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Selection by humans for breeding of useful traits from the natural variation among different organisms
Artificial Selection
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True/False - many animals have analogous structures due to common ancestry
FALSE (homologous)
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Explain the image
Answers vary - comparative embryology
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A species splits into two or more descendant species, resulting in once similar or related species to become more and more dissimilar.
Divergent Evolution
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The hip bones in a whale are examples of _________________ structures.
Vestigial
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Some organisms that share a common ancestor have features that have different functions, but similar structures. These are known as
Homologous Structures
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