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Activity 13. The Processes and Outcomes of Evolution. What process do you think produce the biodiversity of life on Earth? . Read the introduction. Microevolution is evolution on a small scale, and it results in changes in the proportion of genes in a population.
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Activity 13 The Processes and Outcomes of Evolution
What process do you think produce the biodiversity of life on Earth?
Read the introduction. • Microevolution is evolution on a small scale, and it results in changes in the proportion of genes in a population. • Speciation is the formation of species as a result of barriers to gene flow that split the gene pool, followed by an accumulation of differences between the gene pools.
Macroevolution is the larger changes and patterns in evolution. • Extinction occurs when the last member of a species dies. At this point the species is said to be extinct.
Challenge • How do evolutionary processes lead to changes in biodiversity?
Anticipation Guide: The Processes and Outcomes of Evolution • Fill in the Before column of the anticipation guide before beginning the reading. • Fill in the After column once you have completed the reading.
Return to Student Sheet 3.1, “Ideas about Evolution” • Add information from this activity or a previous activity to support whether any of the statements are correct or incorrect.
Analysis 2 • Many Hawaiian honeycreeper birds evolved a musk-like odor that is distasteful to predators. Explain how this adaptation might have evolved through natural selection.
Revisit the Challenge • How do evolutionary processes lead to changes in biodiversity?
Key Vocabulary • adaptation • adaptive character • adaptive radiation • co-opted feature • extinct • extinction • fit • fitness • gene flow • genetic drift • geographic isolation • macroevolution • mass extinction • microevolution • natural selection • reproductive isolation • speciation