Q.I: In which part of the plant food for young plant is stored?
Ans: In cotyledons food is stored for young plant.
Q.II: Why seeds stored in plastic bags do not grow?
Ans: Seeds stored in plastic bags do not grow because oxygen could not reach to the seeds.
Q.III: Why germination in which cotyledons come above the soil is called epigeal?
Ans: The type of germination in which cotyledons come above the soil is called epigeal ( Epi-Above, Geo- earth) germination.
Q.IV: Name Environmental factors which help seed to grow?
Ans: The environmental factors that help seed to grow are: Soil, water, Air, Light and proper Temperature.
Q.V: Can we grow the seeds in complete darkness?
Ans: No, We cannot grow the seeds in complete darkness.
Q.I: Classify seeds on the basis of their cotyledon.
Ans: Seeds can be classify into two types on the basis of cotyledon.
- Monocotyledonous seeds: The seed that has only one cotyledon is called monocotyledonous seed. For example Wheat, Rice maize etc
- Dicotyledonous Seed: The seed that has two cotyledon is called dicotyledonous seed. For example Pea, Bean, Gram etc.
Q.II: Define germination and its types.
Ans: Germination: The coming out of a shoot and root after the bursting of a seed, is called Germination.
Types of Germination
- Hypogeal: In this type of germination cotyledons remains below the soil and only young plant comes out of the soil. E.g. Grain of maize, Wheat etc.
- Epigeal: In this type of germination cotyledons comes out above the soil. E.g. Bean, pea etc.
Q.III: What conditions are necessary for the germination of seeds?
Ans: Water, Soil, air, Light and proper Temperature is necessary for the germination of seeds.
Q.IV: What is the rule of water in the germination of seeds?
Ans: Water has very important rule in the germination of seeds because without water germination is impossible.