1. Simple mitotic division. Many unicellular organisms – protozoa (amoeba, green euglena, etc.) and algae (chlamydomonas) – multiply by simple division into two.
2. Spore formation. Such reproduction consists in the fact that the cell breaks up into a large number of individuals, equal to the number of nuclei pre-formed in the parent cell as a result of multiple mitotic fission of the nucleus.
Spore formation is characteristic of multicellular algae, higher fungi, lower plants, some unicellular animals (malarial plasmodium).
Z. Budding. A small tubercle containing the nucleus, the kidney, forms on the mother cell. It grows and, reaching maternal size, is separated. So yeast and sucking ciliates multiply. In multicellular organisms (freshwater hydra), budding consists in isolating a group of cells from both layers of the body wall.
4. Vegetative propagation. The eye is carried out due to the development of a full-fledged new organism from a part of the mother’s organism; for example, from a leaf (violet), from a tuber (potato), from a part of the shoot – cuttings (poplar).
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.