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Seed Dormancy and Germination (Class XI/XII)

Covers seed dormancy causes, germination conditions, types of dormancy, seed inhibitors, and dormancy-breaking methods across various plant species

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

What is the validity of the seeds of watermelon and tomato?

  1. 2 years
  2. 5 years
  3. 4 years
  4. Several years
Question 2 Multiple Choice (Single Answer)

Which of the following statements is correct?

  1. Lettuce germinates in dark and onion requires light for germination.
  2. Lettuce requires light for germination and onion germinates in dark.
  3. Lettuce and onion require light for germination.
  4. Lettuce and onion germinate in dark.
Question 3 Multiple Choice (Single Answer)

The reason for seed dormancy in xanthium is

  1. impermeability of seed coat to water
  2. impermeability of seed coat to oxygen
  3. presence of plant growth inhibitors
  4. rudiment embryo
Question 4 Multiple Choice (Single Answer)

Availability of food is a limiting factor in the germination of

  1. pea seeds
  2. mango seeds
  3. orchid seeds
  4. apple seeds
Question 5 Multiple Choice (Single Answer)

What is the reason for dormancy in Gingko biloba?

  1. Hard seed coat
  2. Over ripening
  3. Presence of growth inhibitors
  4. Rudiment embryo
Question 6 Multiple Choice (Single Answer)

Waxy coating on a bean seed makes it

  1. resistant to pathogens
  2. impermeable to water
  3. feasible for dispersion by animals
  4. capable of epigeal germination
Question 7 Multiple Choice (Single Answer)

Which of the following kinds of germination is seen in plants growing in O2 deficient soil?

  1. Epigeal
  2. Hypogeal
  3. Vivipary
  4. No germination takes place in O2 deficient condition.
Question 8 Multiple Choice (Single Answer)

Which of the following seeds requires prolonged period of storage for breaking seed dormancy?

  1. Mustard
  2. Apple
  3. Wheat
  4. Melli-lotus
Question 9 Multiple Choice (Single Answer)

What does the process of leaching help in?

  1. Rapid development of embryo
  2. Softening of skin coat
  3. Diluting or removing growth inhibitor
  4. Inducing seed dormancy
Question 10 Multiple Choice (Single Answer)

Which of the following is a natural seed inhibitor found in tomatoes?

  1. ABA
  2. Phenol
  3. Coumarin
  4. Cyanide
Question 11 Multiple Choice (Single Answer)

Osmotic inhibitors ferulic acid and caffeic acid occur in

  1. mountain ash
  2. tomatoes
  3. sugar beet
  4. lemon
Question 12 Multiple Choice (Single Answer)

What is the mechanical removal of callus plugs in melli-lotus called?

  1. Mechanical scarification
  2. Stratification
  3. Impaction
  4. Chemical scarification
Question 13 Multiple Choice (Single Answer)

In which of the following plants do cotyledons act as green leaves after germination?

  1. Tamarind
  2. French bean
  3. Castor
  4. Mango
Question 14 Multiple Choice (Single Answer)

Why are the seeds of teak put into cow dung for a long period?

  1. To induce seed dormancy
  2. To break seed dormancy
  3. To manure the seeds
  4. As a pest control treatment
Question 15 Multiple Choice (Single Answer)

Which of the following processes marks the end of seed germination?

  1. Respiration
  2. Photosynthesis
  3. Reproduction
  4. Flowering
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