Seed Structure and Germination — Important Questions
ICSE · Class 9 · Biology
41 important questions from Seed Structure and Germination for ICSE Class 9 Biology, with answers. Part of the ICSE Class 9 Biology syllabus.
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Important Questions from Seed Structure and Germination
Which of the following are essential conditions for seed germination?
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Water, Suitable temperature, Oxygen
The three essential conditions for seed germination are water (for swelling and enzyme action), suitable temperature (25-35°C), and oxygen (for respiration). Sunlight is not needed initially as seeds have stored food.
The scar on the seed coat marking the point of attachment to the ovary is called:
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Hilum
Hilum is the scar on the seed coat where the seed was attached to the ovary wall. Micropyle is a small opening, testa is the outer seed coat, and tegmen is the inner seed coat.
In epigeal germination, the cotyledons are pushed above the ground.
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True
In epigeal germination, the hypocotyl elongates and pushes the cotyledons above the ground. This happens in bean and castor seeds. In hypogeal germination, cotyledons remain underground.
Which part of the maize grain stores food for the embryo?
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Endosperm
In maize grain, the large endosperm stores food (mainly starch) for the embryo. The scutellum (cotyledon) absorbs food from the endosperm and transfers it to the embryo.
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