Your best friend told you that last week they discovered that there is a new galaxy very similar to ours. which do you think is best way to research this recent discovery? your best friend’s parents an encyclopedia nasa’s internet site a book in the library

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.