Give reasons for the following:
(a) The cell is called the structural and functional unit of life
(b) Plant cells are more rigid than the animal cells.
Answers
a) Each cell is different in shape and structure for different functions of the body performed. The similar cells become tissues and then organs to perform that specific function.
b) Plant Cells have cell wall which is not there in animal cells. So they are more rigid.
Answer: A)A cell is called as the fundamental structural and functional unit of life because they form the building blocks (bricks) of the main organs of organisms. The cells are the basic parts of all organs. These cells in group forms tissues that have specialized function and these tissues together form the organs.
It is functional unit of life because the cells carry out all the functions of body (physiological, biochemical. genetic and other functions).
B)The plant cells are more rigid compared to animal cells as they have a cell wall. It provides rigidity as well as protection from the outer environment. Similarly, when excess water enters the cell, the plant cell swells but it does not burst due to the presence of wall pressure.
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