NEET BIOLOGY

Detailed explanation-1: -(A) Guard cell : This is the correct answer. Cells enclosing the stomatal aperture are bean shaped and are known as guard cells.

Detailed explanation-2: -In plants, gases are exchanged through small openings called stomata which are present mostly on the lower surface of leaves and on green stems. Each stoma has two bean-shaped cells called guard cells.

Detailed explanation-3: -(limf gland) A small bean-shaped structure that is part of the body’s immune system. Lymph glands filter substances that travel through the lymphatic fluid, and they contain lymphocytes (white blood cells) that help the body fight infection and disease.

Detailed explanation-4: -Guard cells are specialized plant cells in the epidermis of leaves, stems and other organs that are used to control gas exchange. They are produced in pairs with a gap between them that forms a stomatal pore.

Detailed explanation-5: -Bean/kidney-shape-The shape of guard cells is convenient for the closing and opening of the stoma to regulate gaseous exchange and release of water.