Evolution Question
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Which scenario is an example of natural selection? (Select all that apply.)
- Farmers crossbreed two types of cows to produce a breed of cow that has high quality beef and can tolerate a hot climate.
- Giraffes that have longer necks survive a dry season by eating leaves from the tops of trees. Those giraffes breed more successfully that year.
- Dogs that have a desirable coat color are bred with one another to produce puppies with the same coat color.
- People kill rattlesnakes that rattle when approached by humans, but people do not kill rattlesnakes that remain silent. The quiet snakes survive and breed.
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