Plants need a rigid cell wall because they are fixed and must withstand environmental forces. Animals move and need flexible cells, so they do not have a cell wall.
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If soaked mung bean seeds are placed in a concentrated solution, they will lose water due to osmosis. As a result, the seeds will shrink and become smaller in size.
Cells are studied using microscopes because they are too small to be seen by the naked eye. Light microscopes and electron microscopes help in observing cell structures and understanding their functions clearly.
All living organisms consist of cells. Some organisms are unicellular, like bacteria, while others are multicellular, like plants and animals. Cells combine to form tissues organs and systems, forming complete living bodies.
A cell multiplies through cell division. In this process, a parent cell divides to form new daughter cells. This helps in growth, repair of tissues and reproduction in living organisms.