What causes mass wasting? kinetic energy

thermal energy

gravity

expansion

9. wind power creates pollution. water air soil noise

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle

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.