1. (B) Shrinkage of cytoplasm in hypertonic medium. Plasmolysis in a plant cell is defined as shrinkage of cytoplasm in hypertonic medium. When a cell is immersed in hypertonic (very concentrated) solution, water diffuses out of the cell by the process of exosmosis. As a result, the cell shrinks. If exRead more

    (B) Shrinkage of cytoplasm in hypertonic medium.
    Plasmolysis in a plant cell is defined as shrinkage of cytoplasm in hypertonic medium. When a cell is immersed in hypertonic (very concentrated) solution, water diffuses out of the cell by the process of exosmosis. As a result, the cell shrinks. If exosmosis continues in a plant cell, the cytoplasm appears to be shrunken. This is called plasmolysis and the cell is said plasmolysed.

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  2. (B) Vacuole Vacuole are covered by a single membrane while mitochondria, but plastid and mitochondria have double membrane.

    (B) Vacuole
    Vacuole are covered by a single membrane while mitochondria, but plastid and mitochondria have double membrane.

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