If one liter of water was poured equally into 1,000 small cubes, then each cube would contain:

Explain the importance of producers, primary consumers, secondary consumers. and decomposers in an ecosystem

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

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.