Unformatted text preview: 6. The effect on survival and reproduction of birds is an example of natural selection. Artificial selection is where humans purposely select two animals that have traits humans like and breed animals so that their offspring will have those traits. 7. Natural selection operates on individuals within a population. Individuals that have the traits most suitable for their environment survive, while those who don’t have those qualities die. The individuals that live mate and produce offspring that have the traits to help them survive. Over time, the entire population acquires this trait through the process of evolution. 8. No, an individual cannot evolve. Evolution occurs over spans of generations, which is a long time. The key to evolution is intraspecific variation—or the similar but different DNA of the individuals in a population....
View Full Document
- Fall '10
- Science, Sarah Kim, new food source