Which occurs during artificial selection but not necessarily during natural selection?

a.Preexisting variation in traits among individuals in a population provides the raw material for the selection process.

b.Only certain individuals in a population mate and pass their genes on to the next generation.

c.Traits that are beneficial to humans are selected for in each generation.

d.Genes carry the biological information that specifies traits in an organism and that the organism passes on to its offspring.

e.Traits that help the organism survive in its environment are selected for in each generation.

-Natural selection and selective breeding (artificial selection) can both produce changes in animals and plants. Like natural selection, artificial selection acts by allowing differential reproductive success to individuals with different genetically determined traits in order to increase the frequency of desirable traits in the population.

-However, unlike naturally selected traits, artificially selected traits do not necessarily convey greater fitness. Instead, artificially selected traits are based on what the person breeding the plants and animals desires.

-Additionally, artificial selection generally is much faster than natural selection, because the next generation can be absolutely restricted to offspring of parents that meet the desired criteria