The cells of an onion peel can be observed in a microscope. The Boundary of onion cell is called (A) which is covered by another thick covering called __(B) . The central dense round body in the centre of cell is called (C). The jelly-like substance between A and C is called _(D). Identify A, B, C, and D.

Correct option is D

The correct answer is A-cell membrane; B-cell wall; C-nucleus; D-cytoplasm.
• An onion is a multicellular (consisting of many cells) plant organism.
• As in all plant cells, the cell of an onion peel consists of a cell wall, cell membrane, cytoplasm, nucleus and a large vacuole.
• The nucleus is present at the periphery of the cytoplasm.
• The vacuole is prominent and present at the centre of the cell.
• It is surrounded by cytoplasm.
• The presence of a cell wall and a large vacuole are indicators that help identify plant cells, such as seen in the onion peel.
• The cells of an onion peel can be observed in a microscope. The Boundary of onion cell is called cell membrane(A) which is covered by another thick covering called cell wall (B). The central dense round body in the centre of cell is called nucleus (C). The jelly-like substance between A and C is called cytoplasm(D)