Question

Germination in seeds can’t be induced by

• A. passage of seeds through animal's digestive system
• B. subjecting the seeds to hot or cold conditions
• C. by scarification methods
• D. by application of ABA

Answer 1

The correct option is D by application of ABA

Seed dormancy can be overcome in a variety of ways in different seeds. Some animals consume certain seeds and when the seeds pass through their digestive system, the digestive juices act upon the hard seed coat and either soften them or introduce cracks in such a way that it facilitates the germination of seeds. The seeds are then passed out through their faeces and can germinate.
Scarification methods include all the methods that are mechanically abrasive. Using knives, sandpaper, vigorous shaking, introduction of harsh chemicals or hot water can help break seed dormancy. Subjecting the seeds to chilling conditions can also help overcome dormancy.
ABA stands for abscisic acid. It is a plant hormone or phytohormone. It induces dormancy in seeds and inhibits seed germination.