4. Why is it most advantageous the sexual reproduction over asexual reproduction for the evolution of species? Explain

Ineed to know why d is the correct answer asap

Examine the air pressure map. which type of line is shown on the map?

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.