第2节 细胞的分化（Differentiation of second cells）.docVIP

第2节 细胞的分化（Differentiation of second cells） Differentiation of second cells [double base abstract] 1. at the early stage of embryonic development, each cell is related to one another, but the number of cells passes through the mitosis of the cell, but some cells undergo different changes. 2. in biological development, the generation of a cell or cell that produces a difference in stability is called a cell. 3. cell differentiation is ubiquitous in the biological community and is the biological basis. The main reason for cell differentiation is that in the process of biological development, different cells perform differently. Some genes are in the state, while others are in the state 4., highly differentiated plant cells are still available under certain conditions The ability to be called cellular totipotent, called cellular totipotent. 5. animals and humans still retain a small number of cells with the ability to divide and differentiate. These cells are called. [classroom feedback] Example 1. the following is not true about cellular differentiation A. cell differentiation is closely related to biological development B. cell differentiation is a ubiquitous life phenomenon in the biological community C. cell differentiation occurs frequently during the embryonic period D. cell differentiation is a process in which cellular, morphological, structural, and physiological functions undergo a difference of stability Example 2.. In the development of a multicellular organism, a fertilized egg can often grow into a complex whole organism, which is mainly one of the following physiological processes that play a role The proliferation of A. cells, the growth of B. cells, the maturation of C. cells, the proliferation of D. cells and the differentiation of cells Example 3. about cellular totipotent, wrong A. plant cells in vitro can exhibit totipotent B. under certain suitable conditions, and the highest totipotent rate of fertilized egg cells C. in vivo, because of cell diffe