The process of flowering and fruiting of plants

1. Flowering: Cells differentiate to form flower buds. When the flower buds mature, the pollen grains in the stamens and the embryo sacs in the pistil ovary mature, the calyx and corolla will open immediately, exposing the pistil and stamens.

2. Results: Through pollination, pollen reached the stigma of pistil, which stimulated the stigma to produce pollen tubes and carried male gametes to ovule for fertilization. After fertilization, the egg cells begin to develop, and after a certain period of time, the ovule and various parts form fruits.

The essence of cell differentiation is the selective expression of genome in time and space. By turning on or off the expression of different genes, the iconic protein was finally produced.

Extended data:

Characteristics of cell differentiation include:

1. The potential of cell differentiation gradually "shrinks" with the individual development process. During embryonic development, cells gradually change from "totipotency" to "pluripotency" and finally to "unipotency", which is the general law of cell differentiation.

2. Cell differentiation is spatiotemporal. In the process of individual development, multicellular biological cells have both temporal differentiation and spatial differentiation.

3. Cell differentiation adapts to the state and speed of cell division, and differentiation must be based on division, that is, differentiation must be accompanied by division, but divided cells may not necessarily differentiate. The higher the degree of differentiation, the worse the ability of division.

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