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13 Cards in this Set
- Front
- Back
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What is geologic time scale?
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They are divisions scientist use to represent evolutionary time.
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After the Precambrian Time what are the basic divisions of the geologic time scale?
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Eras and periods
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What are eras subdivided into?
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Periods
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What is macroevolution?
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Large scale evolutionary changes that take place over long periods of time.
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What are 6 IMPORTANT PATTERNS of macroevolution?
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Mass extinctions, adaptive radiation, convergent evolution, coevolution, punctuated equilibrium, changes in developmental genes.
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Why are extinctions important for macroevolution?
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More niches are available for rest of organisms. It opened a new world of ecological oppurtunity.
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What is adaptive radiation?
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A single species evolved into several different forms that live in different ways. (Darwin's finches)
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What is convergent evolution?
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It is the long-term effect of adaptive radiation. It is when unrelated organisms resemble one another. (dolphins and sharks)
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What is coevolution?
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PRocess where two species evolve in response to changes in each other over time.
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What is punctuated equilibrium?
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Pattern of long, stable periods interrupted by brief perios of more rapid change.
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What did Miller and Urey's experiments suggest?
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Organic compounds that are needed in life could have been produced from simpler compounds present on an early earth.
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What are proteinoid microspheres?
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Tiny bubbles formed by large organic molecules. They have characteristics of living systems.
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What is the endosymbiotic theory?
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Eukaryotic cells came from living communities formed by prokaryotic organisms.
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