Humans and other animals are not made up of the similar structural and functional units called cells.
Why is the cell called the structural and functional unit of cell?
If cell is basic structural and functional unit of life, then life is also present on other planets or stars. Are the aliens made up of cells? Justify.
(a) What would happen if animals had a cell wall?
(b) Why are cell organelles not considered as structural and functional units of a cell?