Olivia researched insects that destroy farmers’ crops. based on this information, she discovered a way to keep the insects away from the plants, without adding any harmful chemicals to the crops. she recorded her conclusion, but did not write down any of the resources she used to learn about the insects. she also did not record information about any of the trials that did not work. does she need to include this information?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.