These MP Board Class 11th Biology Notes for Chapter 10 Cell Cycle and Cell Division help students to get a brief overview of all the concepts.
MP Board Class 11th Biology Notes Chapter 10 Cell Cycle and Cell Division
→ Multicellular organism grows and develop by mitosis cell division, whereas some unicellular organisms reproduce by this division.
→ Body of some lower category of organisms are made up of haploid cells. Zygote of these organ-isms divides by meiosis division to form haploid individual.
→ Meiosis cell division helps in the maintenance of chromosome number in the species.
→ Spindles regulate movement of chromosomes during cell division.
→ Mitosis help to maintain genetic stability.
→ Nerve cells never divide.
→ Generally in normal condition cells complete cell cycle in 20-25 hours.
→ Duration of cell cycle depends upon type of cell and some external factors such as temperature, nutrition, availability of oxygen, etc.
→ Actual cell division occurs in M-phase of the cell cycle.
→ Duration of cell cycle in bacteria is 20 minutes, in epithelial cell is 8-10 hours and in root cells of onion is 20 hours.
→ Cell division is the basis of continuity of life.
→ The main difference between the cell division of plant cell and animal cell are in centriole mechanism and cytokinesis process.