NEET BIOLOGY

Detailed explanation-1: -When cells become damaged or die the body makes new cells to replace them. This process is called cell division. One cell doubles by dividing into two. Two cells become four and so on.

Detailed explanation-2: -Solution : The cells of the injured tissue start dividing and increase in numbers to repair and heal the injured tissue.

Detailed explanation-3: -Injured tissues release chemicals. In response, the body increases circulation to the injured area, bringing white blood cells and nutrients. The injured area and tissues surrounding it become swollen, warm and reddened. The inflammatory response limits function (because it causes more pain) to help the tissues heal.

Detailed explanation-4: -Gene Transmission in Mitosis This works well for replacing damaged tissue or for growth and expansion from an embryonic state. Because the genes contained in the duplicate chromosomes are transferred to each successive cellular generation, all mitotic progeny are genetically similar.

Detailed explanation-5: -While normal cells will stop division in the presence of genetic (DNA) damage, cancer cells will continue to divide. The results of this are ‘daughter’ cells that contain abnormal DNA or even abnormal numbers of chromosomes. These mutant cells are even more abnormal than the ‘parent’ cell.