![]() In the cell’s external environment, the concentration of CO2 is low as compared to that inside the cell. This CO2 must be excreted out of the cell. ![]() Therefore, it is present in high concentrations inside the cell. The Cell membrane is selectively permeable and regulates the movement of substances in and out of the cell.ĬO2 is produced during cellular respiration. Q3 : How do substances like CO2 and water move in and out of the cell? Discuss. In fact, the shape and size of the cell is related to the specific functions they perform. All cells vary in their shape, size, and activity they perform. This is the reason why cells are referred to as the basic structural and functional units of life. A cell is the smallest unit of life and is capable of all living functions. Q2 : Why is the cell called the structural and functional unit of life?Ĭells constitute various components of plants and animals. He used a primitive microscope to observe cells in a cork slice. Question : Solutions of Questions on Page Number : 59Ĭells were discovered in 1665 by an English Botanist, Robert Hooke.
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