ICSE Class 9 Answered
A closed can containing dry seeds bursts open, if some water enters it accidently. Give reason
Asked by ritikkujur66 | 18 Nov, 2018, 09:26: PM
Expert Answer
- Water is one of the essential conditions for the germination of seeds.
- Dry seeds are dormant and require moisture for germination.
- When dry seeds come in contact with water, they imbibe water through their surface, mainly through the micropyle.
- This activates the enzymes present in the seed. These enzymes mobilise the reserve food and break it into simpler forms. This food is utilised by the embryo, and the embryo begins to grow.
- Water causes the seed coat to swell and rupture. The growing embryo then emerges out through the ruptured seed coat.
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