Briefly describe the advantages and disadvantages of asexual reproduction, sexual reproduction and a

Advantages: It can maintain the excellent traits of the original varieties and flower and bear fruit early.

Disadvantages: The root system is not as developed as the seedlings, and the life span is relatively shorter.

Sexual reproduction bai

Advantage 1: The wide variation of gene combinations in sexual reproduction can increase the ability of offspring to adapt to natural selection.

2. Having intrinsic reproductive capacity can also promote the spread of favorable mutations in the population.

3. Sexual reproduction accelerates the process of evolution.

Disadvantages: Sexual reproduction produces a random combination of genes in offspring that may or may not be beneficial to the species.

Asexual reproduction. Advantage 1: The heritability of the obtained seedlings is basically the same as that of the mother plant, and the excellent traits of the mother can be maintained, and the seedlings grow neatly and consistently, with little variation.

2. Since the ontogenetic stage of the new plant continues to develop on the basis of the mother, it can accelerate growth, cross the physiological (developmental) stage, and flowering and fruiting early.

3. For some plants that are not easy to bear fruit or have few seeds, asexual reproduction is conducive to the preservation of germplasm resources. Shortcoming.

1. Reproduction speed: The reproduction rate of sexual reproduction is slow, and the reproduction rate of asexual reproduction is fast. 2. Reproduction method:

Sexual reproduction is produced by the parent, which becomes a fertilized egg through the combination of reproductive cells of both sexes, and then develops into a new individual. 3. Adaptability: Sexual reproduction can produce new traits in offspring, which is conducive to population reproduction and adaptation to the environment, while the offspring of asexual reproduction have low variability and weak adaptability to the environment.

1. Characteristics of sexual reproduction and asexual reproduction

1. Reproduction speed.

1) Sexual reproduction: The rate of reproduction is slower.

2) Asexual reproduction: The rate of reproduction is relatively fast.

2. Reproduction method:

1) Sexual reproduction: Sexual germ cells are produced by the parents, and the fertilized egg becomes a fertilized egg through the combination of reproductive cells of both sexes, and then develops into a new individual from the fertilized egg.

2) Asexual reproduction: no germ cells are involved, no fertilization process is required, and a new individual can be formed directly from a part of the mother's body.

3. Adaptability.

1) Sexual reproduction: It can allow the offspring to produce greater variation, and then produce new traits, which is conducive to population reproduction and adaptation to the environment.

2) Asexual reproduction: The variability of the offspring is low, and the ability to adapt to the environment is relatively weak.

2. What are the plants that reproduce sexually

1. Food crops.

Including wheat, barley, rice, corn, sorghum, millet, millet, etc.

2. Vegetable crops.

Including garlic, green onions, pumpkin, winter melon, cucumber, loofah, celery, leek, vegetable melon, cabbage, white radish, carrot, Jerusalem artichoke, sword beans, peppers, edamame, cowpeas, lettuce, tomatoes, lotus flowers, daylily, etc.

3. Fruits. Including peaches, apricots, pears, apples, sugar cane, grapes, walnuts, plums, cherries, strawberries, sour pears, wild apricots, peach, sea buckthorn, mountain cherry, etc.

4. Miscellaneous. Including rape, cotton, moss, ferns, other seed plants (also known as higher vascular plants, including gymnosperms, angiosperms) and so on.