Class 11 Biology Plant Physiology Plant Growth and Development



Legume seeds exhibit dormancy because of ......................
(a)
Undeveloped embryos
(b)
Hard seed coat
(c)
Absence of cytokinins
(d)
Absence of gibberellic acid
Correct answer: (b) 
Solution: A dormant seed is one that is unable to germinate in a specified period of time under a combination of environmental factors that are normally suitable for the germination of the non - dormant seed. Dormancy is a mechanism to prevent germination during unsuitable ecological conditions, when the probability of seedling survival is low. Legume seeds exhibit dormancy because of the presence of a hard seed coat which is tough to break.

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plant growth and development
respiration in plants
transport in plants
anatomy of flowering plants
photosynthesis in higher plants