Why do sunflowers follow the sun?

The obvious reason for the flower following the Sun at this stage would be to maximize photosynthesis. Each sunflower plant has only one flower on its stem. Therefore, during pollination, it is essential that the plant's only means of reproducing gets noticed by pollinators (mainly insects).

Explanation:

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genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

the actual answer was 160934