AP BIOLOGY

Detailed explanation-1: -Plant reproduction greatly depends on an adequate supply of photosynthetic products. Water shortage results in the inhibition of the photosynthesis process, and thus in the reduction in the nutrient supply to the generative organs.

Detailed explanation-2: -Sexual reproduction in flowering plants involves the production of separate male and female gametophytes that produce gametes. The anther produces pollen grains which contain male gametophytes. The pollen grains attach to the stigma on top of a carpel, in which the female gametophytes (inside ovules) are located.

Detailed explanation-3: -Sexual reproduction produces offspring by the fusion of gametes, resulting in offspring genetically different from the parent or parents. Asexual reproduction produces new individuals without the fusion of gametes, genetically identical to the parent plants and each other, except when mutations occur.

Detailed explanation-4: -Sexual mode of reproduction is considered to be better than the asexual mode of reproduction. This is because, in asexual reproduction, the only single parent gives rise to another offspring which is exactly similar to the parent as it passes its genetic material to the offspring.