speciation through isolation 11.5. student self assessment 1. i barely know what the subject is. i...
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Speciation Through Isolation
11.5
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Student Self Assessment
1. I barely know what the subject is. I need significant help.
2. I think I’m starting to get it, but I need some clarification. I do make some mistakes.
3. I have a strong grasp of the subject. I make few mistakes.
4. I understand this as well as any other student in this classroom. I can help others.
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Reproductive isolation occurs when members of different populations can no longer mate successfully with one another.
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The rise of 2 or more species from one existing species is called speciation.
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Behavioral isolation is isolation caused by differences in courtship or mating behaviors.
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Geographic isolation involves physical barriers that divide a population into 2 or more groups.
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Temporal isolation exist when timing prevents reproduction between populations.
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Patterns in Evolutions
11.6
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Mutations are random, but natural selection is not random!
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Evolution towards similar characteristics in different species is called convergent evolution.
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When closely related species evolve in different directions they become increasingly different through divergent evolution.
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Coevolution is the process in which 2 or more species evolve in response to changes in each other.
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When a species is unable to adapt to a change in its environment this leads to its elimination from Earth – extinction.
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Species creation (speciation) occurs suddenly and is followed by long periods of little evolutionary change. This is known as punctuated equilibrium.
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The diversification of an ancestral species into many descendent species is known as adaptive radiation.
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Student Self Assessment
1. I barely know what the subject is. I need significant help.
2. I think I’m starting to get it, but I need some clarification. I do make some mistakes.
3. I have a strong grasp of the subject. I make few mistakes.
4. I understand this as well as any other student in this classroom. I can help others.