Explain how water enter the soil root hairs of the plant

Aprocess in green plants that involves the use of carbon dioxide and water in the production of glucose and oxygen using the suns energy

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.

Which of the following is not a symptom of desertification?