Richard is an avid gardener who spends a lot of time caring for the plants in his garden. to minimize damage from pests from his
garden, richard uses a pesticide spray. at first the spray is very effective and kills off most of the insects that he sees on his vegetable plants. however, after a few years of using the same pesticide he notices that some insects are surviving and continuing to eat his plants. the constant use of pesticides by richard has led to genetic changes in the population over many generations. this is an example of
Evolution is a gradual process in which the characteristics of a species are changed in response to its environment over several generations. Evolution depends on the process of natural selection. Some of the changed characteristics (traits) may be beneficial to the organism and it can be transferred to their offspring.
