Why is genetic variation a prerequisite for evolution? ?

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different

Why does sexual reproduction result in more genetic variation in a species