adaptations to the environment. adaptations any trait that helps an organism survive in its...
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Adaptations to the Environment
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Adaptations
Any trait that helps an organism survive in its environment.
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Variations
Physical differences in species due to sexual reproduction.
Ex: fur color, size, height, etc.
This provides diversity between members of the same species in a population.
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Environmental Changes
Climate
Habitat
Food source
Predators
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Adapting to the Changing Environment
Variations in a population cause some individuals to survive an environmental change and reproduce.
The good traits are passed down to their offspring, changing the appearance of the overall population.
Several Generations!
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Populations in Isolation
Members of the same species isolated in a different environment will appear much differently.
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Natural Selection
Organisms with the best traits for an environment survive and reproduce.
Survival of the fittest.
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(1) Overproduction
More offspring are born than can survive.
(2) Competition
Limited resources.
(3) Variations
Sexual reproduction-everyone is different.
(4) Selection
Only the fittest survive to reproduce.
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Evidence for Adaptations
Fossils are the preserved remains of an organism.
The fossil record is all of the fossils that have ever been discovered world wide.
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The Fossil Record
The fossil record provides evidence for how a species adapted to changing environments.
The fossil record also provides evidence of how environments changed throughout Earth.
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