Can someone be my boyfriend please, don't forget to post ur sxy faces

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.

Gram-negative bacteria have a cell wall that is! and does not accept the stain, making itappear

Drag the tiles to the correct boxes to complete the pairs. match each cell organelle with its description.