Please try to answer as much as u can if u answer all of them ill give u brainiest thanks and 5 stars~

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.

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.

What is the net atp production at this stage of cellular respiration? 2atp aatp 32 atp 36 atp