Asexual reproduction is a way to produce new individuals directly from the mother without germ cells. In essence, somatic reproduction is asexual reproduction. The main types include fission propagation, spore propagation, bud grafting propagation and vegetative propagation (grafting, layering, cutting, etc.). ), tissue culture and cloning.

Bud grafting reproduction, also called budding reproduction, is a reproductive mode in which the mother gives birth to a bud at a certain position. The bud gradually grows up, forms the same individual as the mother, falls off from the mother and becomes a complete new individual. Yeast and hydra (which also reproduce sexually when the environment is bad) often germinate and reproduce.

B, vegetative reproduction is a reproductive mode in which vegetative organs (roots, leaves and stems) of plants produce new individuals, which is called vegetative reproduction; For example, tubers of potatoes, creeping branches of strawberries and leaves of begonia can germinate, and these buds can form new individuals.

C. Fission reproduction, also known as fission, is a reproductive mode in which an organism splits a new individual from its mother. Common in single-celled organisms (division is reproduction), such as bacteria.

D. destructive reproduction is one of the ways of asexual reproduction. An organism breaks into two or more segments at a certain or uncertain position, and then each segment develops into a new individual, such as a worm.

So choose: B.