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Ch 19.2 Patterns and Processes of Evolution

Ch 19.2 Patterns and Processes of Evolution. Pg 546- 552. Macroevolutionary patterns. Refer to : The changes made by evolution over long periods of time and across a wide number of organisms Include: speciation and extinction. Punctuated Equilibrium & Gradualism. Both describe:

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Ch 19.2 Patterns and Processes of Evolution

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  1. Ch 19.2 Patterns and Processes of Evolution Pg 546- 552

  2. Macroevolutionary patterns • Refer to : • The changes made by evolution over long periods of time and across a wide number of organisms • Include: • speciation and extinction

  3. Punctuated Equilibrium & Gradualism • Both describe: • Rates if evolution

  4. Adaptive Radiation • Is: • Process by which a single species evolves over a short time into several different forms that live in different ways • Can occur when: • A part of a population moves to a new place or when other organisms become extinct.

  5. Convergent Evolution • Is: • The process by which unrelated organisms evolve info forms that resemble each other • Occurs when: • The organisms face similar environmental challenges

  6. Coevolution • Is: • When 2 species evolve in response to changes in each other. • Occurs when: • The relationship between 2 organisms is so specific that neither can live without the other • Examples are: • Flower and pollinators, plants and herbivorous insects.

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