有性繁殖与无性繁殖（Sexual reproduction and asexual reproduction）.docVIP

有性繁殖与无性繁殖（Sexual reproduction and asexual reproduction） Size: one of the questions raised by the students who answered the questions: what is sexual reproduction? Asexual reproduction? (I) asexual reproduction Asexual reproduction is the process of producing new individuals directly from the mothers body without 22 combinations of the cells. Essentially, the propagation by somatic cells is asexual reproduction. The following table is a common asexual reproduction. Fission by a biological individual directly split into two new individuals, the two new individual size and shape is basically the same as Paramecium, amoeba, bacteria Budding maternal grow buds, the bud development into a new individual and maternal like yeast, Hydra Spore fungus and some plant cells can produce some asexual spores in the body cells, under suitable germination into new individual Penicillium, Aspergillus, Adiantum A part of the vegetative organ of a plant (root, stem, leaf) that develops into a new individual after the shedding of the parent, tuber of potato, root of thistle, and leaf of Begonia Explain： 1, unicellular organisms can only reproduce by division. 2, the budding in the bud refers to the parent grow buds, rather than higher plants real bud structure. For example, the potato is propagated by the bud, which is propagated by tubers, which is called vegetative reproduction rather than budding. Essentially, bud and the mother is the same, only some small buds. 3. The spores in asexual reproduction are asexual spores, which share the same chromosome number or DNA number as somatic cells. Therefore, asexual spores are produced only by mitosis or mitosis, but not by meiosis. 4, the nutrition reproduction is to reproduce the nutritional organs of plant, differentiation, only plants have roots and leaves. Therefore, it is a kind of asexual reproduction of higher plants, low plant cells cannot be gamogenesis. Two. Sexual reproduction 1, sexual reproduction is the most common form of repr