Question 1:
Assertion (A): Isolated single cells can be fused to produce somatic hybrids.
Reason (R): Cells selected for somatic hybridisation have desirable characters.
Reason (R): Cells selected for somatic hybridisation have desirable characters.
Question 2:
Assertion (A): The meristems are grown 'in vitro' to obtain virus-free plants from an infected plant.
Reason (R): If the plant is infected with a virus, the roots and the stems are free of virus.
Reason (R): If the plant is infected with a virus, the roots and the stems are free of virus.
Question 3:
- (a) Mention any two advantages of micropropagation techniques.
- (b) Write in brief how the process is carried out in the laboratory.
- (c) Name any two important food plants grown commercially by this method.
Question 4:
Enlist one advantage and two disadvantages of green revolution.