Joints can be described by the amount of movement they allow. the three major classifications of functional joints are synarthroses, amphiarthroses, and diarthroses. drag and drop the example or definition to the correct functional joint bin. freely movable joints slightly movable joints immovable joints synarthroses amphiarthroses diarthroses

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.