GENERAL HISTOLOGY

Detailed explanation-1: -As plants cannot move from one place to another so they need greater protection against variations in temperature, high wind speed, atmospheric moisture, etc. Therefore, for protection they have an additional layer surrounding the cell membrane This layer is called the cell wall.

Detailed explanation-2: -The presence of a cell wall is a distinctive feature of a plant cell. It’s a non-living hard structure that serves as a protective layer for the plants’ plasma membrane. The cell wall is primarily composed of cellulose.

Detailed explanation-3: -A plant cell wall is arranged in layers and contains cellulose microfibrils, hemicellulose, pectin, lignin, and soluble protein. These components are organized into three major layers: the primary cell wall, the middle lamella, and the secondary cell wall (not pictured).

Detailed explanation-4: -Final answer: cell wall gives shape and support to the plant cell. Q. The parts P and Q are present only in plant cells, they are not present in animal cells.