Cell differentiation and cell omnipotence.

related topics the differentiation of cell
cells, the basic unit of life activities, is a very complex process and one of the hot topics in biology research. Why are there significant differences in morphology, structure and function between the cells of an organism developed from a fertilized egg? This is related to cell differentiation. Cell differentiation refers to the process by which the divided cells change in different directions in morphology, structure and function. Those forms are similar, the structures are the same, and the cell groups with certain functions are called
tissue
.normal, cell differentiation is stable and irreversible. Once a cell is subjected to some kind of stimulus change and begins to differentiate in a certain direction, differentiation can continue through cell division, even if the stimulus that causes the change no longer exists.embryonic cells need to go through a stage called decision before they can display specific morphological structures, physiological functions,
bio-chemical and
characteristics. At this stage, although the cells have not yet shown specific morphological characteristics, there have been specific changes in the internal differentiation in this direction.the cells are determined sooner or later, vary from animal to animal and tissue, but are generally a gradual process. For example, in amphibians, transplanting the early body sections of the nerve embryo from the normal part to the abdomen of the same embryo can also change the direction of differentiation, not forming muscles and forming kidney tubes and red blood cells. However, to the late nerve embryo transplantation body section, can not change the direction of the body section differentiation. It can be seen that the division of body section in this period has been decided steadily.process: fertilized eggs (through proliferation) - Cells (differentiation) - tissues - organs - systems - organisms
cause various cells have exactly the same genetic material, but the implementation of genetic material in different cells is different
characteristics persistence: cell differentiation throughout the life process of organisms, in the embryonic period to achieve a maximum 2. irreversible Sex: Generally speaking, differentiated cells will remain differentiated until death 3. Universality: is a universal life phenomenon in the biological world, is the basis of individual biological development cellular differentiation:concept: the same cell offspring in morphology, structure and physiological function of the stability difference processtime: occurred throughout the life process, embryo time to a maximum
.
result: the formation of different cells and tissues .Plant cell omnipotence: 1. Differentiated cells still have the potential to develop into complete plants2. Exosplants →Insitive tissues→ embryos→ larvae Cells have omnipotent causes:body cells are descendants of silky division of fertilized eggs, the number of chromosomes in the cells before and after silk division, the number of nucleosomes
DNA
does not change, and its characteristics remain unchanged. As a result, no individual cells (except for some cells where the nucleocles have degenerated cells such as red blood cells) have genetic information contained in the same fertilized egg cell. Therefore, each somogenic cell has the potential to develop individually as an individual (e.g., pollen ionosome
culture
). Therefore, cells have an all-round type.
.