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14 Cards in this Set
- Front
- Back
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What prompted Darwin to publish his findings on evolution and species diversity?
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A paper by Alfred Wallace that paralleled with Darwin's findings.
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Darwin published his work, ______________, that presented evidence of evolution and natural selection.
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On the Origin of Species
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_________ ________ are differences that are passed from parents to offspring.
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heritable variation
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In _________ _______, nature provided the variation, and humans selected those variations that they found useful.
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artificial selection
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Why did Darwin believe heritable variation was important?
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It allowed species to change according to their environmental demands.
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The concept of ___ __ ____ means that members of each species compete regularly for food, shelter and other necessities of life.
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struggle for existence
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_____ is the ability of an individual to survive and reproduce in its specific environment.
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fitness
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An _________ is any inherited characteristic that increases an oganism's chance of survival.
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adaptation
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How did fitness play into the concept of natural selection?
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Only the fittest of any species will survive.
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Darwin referred to the survival of the fittest as ____ ___.
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natural selection
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Each living species has descended, over time, with changes - this principle is ____ ____ _______.
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descent with modifications
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The principle that all living species have common ancestors is known as ___ ___.
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common descent
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Where can evidence of evolution be found?
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1. fossil record -fossil indicate that life on Earth has changed over time
2. geographical distribution - species living in different geographical places have similar characteristics 3. homologous structure - all 4 limbed vertebrates descended from commom ancestors. 4. similarities in embryo - many animals with backbones have similar embryo |
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_____ _______ are organs that are still present but have no function for the species.
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Vestigial organs
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