Why is the cell called the structural and functional unit of life?
Q.(i) Why is the cell called the structural and functional unit of life?
(ii) Why is the plasma membrane called a selectively permeable membrane?
(iii) Name the factor which decides the movement of water across the plasma membrane.
Ans.
(i) Cells are the smallest unit which constitutes the body of all living organisms and perform certain basic functions that are essential for all living forms. Therefore, it is called the structural and functional unit of life.
(ii) Plasma membrane allows some substances to go in and out of the cell but does not allow some other substances to either enter or leave the cell. So, it is called a selectively permeable membrane.
(iii) Amount of substance (solute) dissolved in water.
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