NTA Abhyas NEET2020BotanyPlant - Growth and DevelopmentPractice
There were four dormant seeds with their own reasons of dormancy. Help them grow by breaking their dormancy. Cause of dormancy Way to overcome 1 . Impermeable seed coat i. Changing the environment. 2 . Double dormancy ii. Scarification 3 . Dry seed iii. Cold, moist storage for 4-12 weeks 4 . Immature Embryo iv. Abrasion of seed coat and stratification
Options
- A1 - i i , 2 - i i i , 3 - i , 4 - i v
- B1 - i v , 2 - i i , 3 - I , 4 - i i i
- C1 - i i i , 2 - i v , 3 - i , 4 - i i
- D1 - i i , 2 - i v , 3 - i , 4 - i i i
Correct answer
D. 1 - i i , 2 - i v , 3 - i , 4 - i i i
Step-by-step solution
Scarification is the process of weakening, opening or altering the coat of seed to encourage germination, therefore the impermeable seed coat is overcome by scarification. Double dormancy involves two reasons of dormancy which has to be overcome. They are usually : hard seed coat and immature embryo which can be overcome by abrasion of the seed coat and stratification. Dry seed can be overcome by growing it in a moist environment. Embryo rest means when the embryo is immature to grow and that can be overcome by str