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Plant Growth and Development — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYPlant Growth and Development2 Marks
Question
  1. Define seed dormancy.
  2. Mention two causes for seed dormancy.
✓

Answer

  1. Seed dormancy is defined as the inherent or endogenous blocks in the seed that do not allow the seed to germinate even under favourable conditions.
  2. It is caused by:
  1. The presence of hard seed coat, which is impervious to gases and/ or water.
  2. The presence of certain inhibitory chemicals in the seed.
  3. Immature embryo.

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