If there were only one pushpin used, what would be the shape of the ellipse? What would its eccentricity be? (pls just answer this if your going to answer with a link, you will be reported)

i think that the best answer would be c.

tell me if im wrong : )

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).