Question

Discuss the modern concept of cell theory.

Answer 1

Modern cell theory states that:

1. The bodies of all living beings are made up of cells and their products.
2. Cells are units of structure in the body of living organisms. Every cell is made up of a mass of protoplasm having a nucleus, organelles and a covering membrane.
   
3. Cells are units of function in living organisms, that is, the activities of an organism are the sum total of the activities of its cells.
4. Life exists only in cells because all the activities of life are performed by cells.
   
5. Growth of an organism involves the growth and multiplication of its cells.
   
6. Genetic information is stored and expressed inside cells.
   
7. Life passes from one generation to the next in the form of a living cell.
   
8. New cells arise from pre-existing cells through division. All new cells contain the same amount and degree of genetic information as contained in the parent cell.
   
9. Basically the cells are totipotent unless and until they have become extremely specialized.