3. 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
Answer:
(a) Cells help the body to perform various activities necessary for living. They help in respiration, digestion, and more. They provide energy to the body and help us to grow. They are the smallest possible form of life. (ik this is big but I can't remember a one line answer)
(b) Plants cannot move. They are stationary, while animals move as they wish. So Plants need extra protection against the harsh weather and conditions. Therefore they have an extra later of protection (cell wall).
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Explanation: 3.
(a)answer : Cells are called the structural and functional unit of life because all the living organisms are made up of cells and also all the functions taking place inside the body of organisms are performed by cells.
Cells combine to form tissues, which further combine to form organs, organs combine to form organ systems, which further combine to form organism. So, cell is the basic structural unit for all unicellular and multicellular organisms.
(b)answer: due to presence of cell wall which is non living thing , plant cells are more rigid than animal cells.
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