Question
Give scientific reason : The stomata in leaves keep on opening and closing
✓
Answer
- On one or both the surfaces of the leaves of flowering plants, there are numerous stomata as minute pores.
- Each of these pores is guarded by a pair of guard cells.
- The opening and closing of the stomata is controlled by these guard cells, which contain chloroplasts.
- When water enters the guard cells, the latter swell and cause the opening of stomata and when the guard cells lose water, the guard cells contract and cause the closing of stomata.
- Thus, the stomata in leaves keep on opening and closing due to entry and exit of water in the guard cells.
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