Asexual reproduction refers to a reproductive mode in which new individuals are directly produced by the mother without the combination of bisexual reproductive cells. It can be divided into fission propagation (such as paramecium, amoeba, Eupolyphaga and bacteria), bud propagation (yeast and hydra often germinate and reproduce), spore propagation (generally lower plants and fungi are spore propagation, such as Adiantum, Penicillium and Aspergillus) and nutrition. Apples, pears and peaches are often grafted.

First, the application of asexual reproduction

Asexual reproduction is a reproductive mode that directly produces new individuals from the mother without the combination of bisexual reproductive cells, which can be divided into fission reproduction, budding reproduction, spore reproduction, vegetative reproduction and so on.

1, fission propagation

Split reproduction refers to the way in which an organism splits from its mother to produce new offspring. The size and shape of new individuals produced by division and reproduction are roughly the same. In single-celled organisms, such as paramecium, amoeba, Eupolyphaga, bacteria, etc.

2. Bud grafting propagation

Bud reproduction refers to the reproductive mode in which the mother gives birth to buds in a certain part. 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 (hydra also have sexual reproduction when the environment is bad) often sprout and reproduce.

3. Spore reproduction

Spore reproduction means that some organisms can produce a kind of cell when they grow up, and can directly form new individuals without pairing. Generally, lower plants and fungi reproduce by spores, such as Adiantum, Penicillium and Aspergillus.

4. Nutritional reproduction

Vegetative propagation refers to the way in which vegetative organs (roots, leaves and stems) of plants produce new individuals, such as potato tubers, thistle roots, strawberry creeping branches, begonia leaves, etc., all of which can germinate and these buds can form new individuals. In this way, the offspring can keep the characteristics of their parents, so people often use artificial methods such as rooting, cutting, grafting, layering and high pressure to propagate flower and fruit trees, such as cutting for cultivating sweet potatoes, grapes, chrysanthemums and Chinese roses. Apples, pears and peaches are often grafted.

Second, the difference between asexual reproduction and vegetative reproduction

1, vegetative reproduction is a kind of asexual reproduction, and there is a relationship between them. Vegetative propagation is the most common way of asexual propagation of plants. Compared with sexual reproduction, the most fundamental difference is that it does not pass through the combination of bisexual germ cells.

2. The natural asexual reproduction is called natural asexual reproduction, such as strawberry creeping branches, begonia leaves and potato tubers; Artificial assisted asexual reproduction is called artificial asexual reproduction, such as cutting and grafting.