True seed dormancy:
1.  is caused by conditions within the seed that prevent germination under normally ideal conditions.
2.  is caused by unfavourable environmental conditions.
3.  is seen in all seeds.
4.  does not have any evolutionary significance.

 58%
Level 3: 35%-60%
Hints

Chemical inhibitors present in dormant seeds may include all the following except:
1.  Abscisic acid 2.  Phenolic acids
3.  Para-ascorbic acid 4.  Gibberellic acid
 76%
Level 2: 60%+
Hints

Seed dormancy can be overcome by all the following methods except:
1.  Mechanical abrasions or vigorous shaking
2.  Microbial action
3.  Subjecting seeds to chilling conditions
4.  Treating seeds with abscisic acid or para-ascorbic acid
 72%
Level 2: 60%+
Hints

advertisementadvertisement