Which statement is scientifically based? Mutations rarely occur.
All mutations are harmful.
Some mutations can be contagious, like infections.
O Mutations are not passed from parent to offspring.

Anton created a chart listing different types of materials. which best complete the chart?

Match each term to its best definition? sedimentary depositional enviornment

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.