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Speciation and Isolation
- Evolution and isolation involve speciation events, where one species becomes two or more.
- Reproductive isolation, the inability to interbreed, finalizes speciation.
Bear Speciation
- Black bears and polar bears exemplify speciation through isolation.
- Polar bears evolved white fur due to environmental pressures in snowy landscapes, unlike black bears.
Reproductive Isolation
- Speciation occurs when groups become different enough to prevent interbreeding.
- This gradual divergence leads to distinct species over time.