Scientists estimate that only 1 percent of prokaryotes can be grown in the lab. what does this suggest about our knowledge of bacteria and archaea?

What is an animal that lives by preying on other animals

Which could be a pathway of food through an ecosystem

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.