AP BIOLOGY

Detailed explanation-1: -The correct answer is (E) Sexual reproduction produces a greater variation in spring than asexual reproduction. (E) Sexual reproduction produces a greater variation in spring than asexual reproduction. Sexual reproduction involves the fusion of male and female gametes.

Detailed explanation-2: -The major disadvantages of asexual reproduction are: Lack of diversity-Since the offsprings are genetically identical to the parent they are more susceptible to the same diseases and nutrient deficiencies as the parent.

Detailed explanation-3: -Although sexual reproduction involves more time and energy, higher organisms have resorted to sexual reproduction in spite of its complexity. This is because this mode of reproduction helps introduce new variations in progenies through the combination of the DNA from two (usually) different individuals.

Detailed explanation-4: -A disadvantage is that sexual reproduction takes longer than asexual reproduction. A mate must be found, the egg must be fertilised by sperm, and then the offspring develop. The benefit of introducing genetic variation into the species, however, outweighs this disadvantage.