LIFE SCIENCE

Detailed explanation-1: -The main function of the cell wall is to provide structural strength and support, and also provide a semi-permeable surface for molecules to pass in and out of the cell.

Detailed explanation-2: -Its main function is to give the cell rigidity, strength, and protection against mechanical stress. Examples of organisms with cell walls are plants, fungi, protists (particularly molds and algae), and most bacteria (few exceptions are mycoplasma and L-form bacteria) have cell walls.

Detailed explanation-3: -It provides a structural framework to support plant growth and acts as the first line of defense when the plant encounters pathogens. The cell wall must also retain some flexibility, such that when subjected to developmental, biotic, or abiotic stimuli it can be rapidly remodeled in response.

Detailed explanation-4: -cell walls permit the cells of plants, fungi and bacteria to withstand very dilute (hypotonic) external media without bursting because in such media the cells tend to take up water by osmosis. The cell swells, building up pressure against the cell wall.

Detailed explanation-5: -It provides protection to the cell and prevents from any physical damage. It provides structure to the cell. It prevents from osmotic bursting. It protects the protoplasm against mechanical injury.