Explain natural selection from population evidence
The idea
Start with variation already present among individuals, including heritable differences.
Step by step
- Start with variation already present among individuals, including heritable differences.
- Compare survival and reproduction in the stated environment.
- Describe population change over generations rather than an individual choosing a needed trait.
Example
Before a drought, a plant population already has inherited differences in root depth. Which part of natural selection is described?
Answer
heritable variation
The population contains inherited differences before the selective event.
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Create an invented insect population with two inherited colors. Explain how a change in background could alter their reproductive success.
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