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NTA AbhyasNTA Abhyas 2020Cell : The Unit of Life
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Plant cell is a eukaryotic type cell with well defined nucleus. It has a cell wall and chloroplast (for phosynthesis). The plant cell contains a large organelle, vacuole. It contains water, cell sap, excretory products and other substances. The vacuole is enclosed by a single membrane called tonoplast. The membrane facilitates movement of a number of ions and other materials against concentration gradient.