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Decent with modification
the passing on of traits from parent organisms to their offspring
Traits
Common descent
the scientific theory that all living organisms on Earth descended from a common ancestor.
What's needed for natural selection?
1. Produce more offspring that can survive
2. Compete for limited resources
3.variation within species
4. Variation is heritable
5. Variation benefits some to survive better
6.better suited = live longer = traits get passed down
7. Time
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