NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Explain why animal cells, including human cells, do NOT have a Cell Wall.
A
Animal cells would be unable to move nutrients by diffusion from the interstital fluid. They would also be unable to move waste by diffusion out of the cell.
B
Animal cells communicate with other cells by way of Carbohydrates in the cell membrane. A cell wall would hinder this communication system.
C
A cell wall only allows movement into the cell. Animal cells must be able to release waste as well and accept nutrients.
D
All cells actually do have a cell wall. In animal cells, the cell wall is very thin. This allows for diffusion of nutrients and waste to occur.
Explanation: 

Detailed explanation-1: -Plant cell needs cell wall whereas animal cell do not because the plants need rigid structure so that they can grow up and out . All cells have cell membranes, and the membranes are flexible. So animal cells can have various shapes, but plant cells only have the shapes of their cell walls.

Detailed explanation-2: -Animal cells do not have cell wallsbecause they do not need them. Cell walls, which are found in plant cells, maintain cell shape, almost as if eachcell has its own exoskeleton. This rigidity allows plants to stand upright without the need for bones .

Detailed explanation-3: -If an animal cell had a cell wall, it would prevent it from performing all of its regular tasks, such as running, eating, or performing any other tasks that are as necessary because a cell wall would stiffen the animal cell and prevent it from performing any of these tasks.

Detailed explanation-4: -The lack of a rigid cell wall allowed animals to develop a greater diversity of cell types, tissues, and organs. Specialized cells that formed nerves and muscles-tissues impossible for plants to evolve-gave these organisms mobility.

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