How are selective breeding and natural selection similar how are they different?

Selective breeding and natural selection are similar  because  they are both giving certain traits to offspring.
DIFFERENCE: 
natural selection-Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
selective breeding-Selection by humans for breeding of useful traits from the natural variation among different organisms

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Hello there,before the 1940s, scientists believed that proteins, rather than dna, were the carriers of genetic material in the cell. why?   answer:   proteins are present within the nucleus