Multiple choice questions IV — task. Science CBSE, Class 9.

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1. Plasmolysis in a plant cell is defined as

Break down (lysis ) of plasma membrane in hypotonic medium
Shrinkage of cytoplasm in hypertonic medium
Shrinkage of nucleoplasm
None of them

2. Which of the following are covered by a single membrane?

Lysosome
Mitochondria
Vacuole
Plastid

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