Answer:
The presence of cell wall in plants.
Explanation:
A plant cell possesses a cell wall, the presence of a cell wall provides rigidity to it. On the other hand, the cell in animals exhibits no cell wall. The animal cells possess a cell membrane that is, also known as the plasma membrane.
The surface of a tree feels harder in comparison to the surface of a dog is because of the presence of cell wall in plant cells, which is lacking in the cells of a dog. A cell wall refers to a structural layer enveloping certain kinds of cells and is present external to the membrane of the cell. It can be flexible, tough, and rigid as well. It offers the cell with both structural protection and support, and also functions as a filtering mechanism.
Plant cells have a CELL WALL that provides structural (mechanical) support to plant cells.
Plants (kingdom Plantae) are multicellular organisms characterized to have a cell wall that surrounds the plasma membrane of their cells.
The cell wall is a structure mainly composed of cellulose, a complex carbohydrate formed by many glucose subunits linked together via glycosidic bonds.
This structure (cell wall) provides tensile strength to the plant cells and forms a protective layer against mechanical/osmotic stress conditions.
In conclusion, plant cells have a CELL WALL that provides structural (mechanical) support to plant cells.
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