Class 5th General Science Chapter #3 Exercise : Seed Structure and Germination

Class 5th General Science Chapter #3 Exercise : Seed Structure and Germination

Short Questions

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.

                                                                        Long Questions

                                                                           Exercise#3

Q.I: Classify seeds on the basis of their cotyledon.

Ans: Seeds can be classify into two types on the basis of cotyledon.

  1. Monocotyledonous seeds: The seed that has only one cotyledon is called monocotyledonous seed. For example Wheat, Rice maize etc
  2. 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.

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