Multiple choice

Which of the following are types of exogenous seed dormancy?

  1. Physical dormancy
  2. Mechanical dormancy
  3. Chemical dormancy
  4. Physiological dormancy
  5. Morphological dormancy Select the correct answer using codes given below:

  1. 1, 2 and 3

  2. 1, 3 and 5

  3. 2, 3 and 4

  4. 2, 4 and 5

  5. 3, 4 and 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Exogenous seed dormancy is caused by conditions outside the embryo. Exogenous dormancy is often categorised into three subgroups: Physical dormancy: Dormancy that is caused by an impermeable seed coat is known as physical dormancy. Mechanical dormancy: Dormancy that occurs when seed coats or other coverings are too hard to allow the embryo to expand during germination. Chemical dormancy: This type of dormancy is caused by the presence of chemicals located in the seed coat inhibiting germination of the embryo.

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