Question

Q11.a) Explain the process of growth and cell division in cells with the help of a diagram. (3)

b) Why an injury in nervous system cannot be healed?

Answer 1

Somatic cells divide by the process of mitosis in which each cell gives rise to two daughter cells. Cells heal and repair by the process of cell division. Nerve cells lack the capacity for regeneration and division bcoz they lack certain organelles called centrioles which are required for cell division to occur