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प्रश्न
Describe the process of germination in bean and maize seeds.
उत्तर
Germination in bean seed is called epigeal germination. It occurs as follows:
- Germination starts with the uptake of water, which bursts the seed coat, and the radicle comes out and grows downwards.
- The region of plumules elongates and the seed comes out of the soil. The plumule emerges between the two cotyledons.
- The plumule forms two green leaves.
- The food stored in the cotyledons is used for growth and cotyledons shrivel and fall off.
- The radicle gives rise to the root system while the plumule forms the shoot.
Germination in maize seed is called hypogeal germination. It occurs as follows:
- The seeds absorb water and swell.
- Radicle comes out of the seed and forms the primary root.
- The plumule comes out forming the leaves.
- The food stored in the endosperm is used for growth
- The cotyledons remain below the ground.
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संबंधित प्रश्न
Justify the statement that the maize grain is a 'one-seeded fruit'.
Put a tick mark (✓) against the correct alternative in the following statement
If the cotyledons remain under the soil, then such seeds type of germination is called
Differentiate between the following pair of terms:
Testa and tegmen.
Name the part of the seeds from which the following are given out:
(a) Roots :
(b) Leaves :
In the spaces provided below, draw labelled diagrams to show the three stages in the germination of any seed you have observed.
In bean seed, germination is _______.
Fill in the blanks:
A mature seed consists of ______ and ____ coat.
Name the following:
The part of the seed which gives out the shoot.
Give two examples of the following:
Dicotyledonous albuminous seeds.
Differentiate between:
Albuminous seed and Exalbuminous seed.
