Sanjay, a research scholar wants to develop a disired variety of Guava in his orchard. Which of the following methods of vegetative propagation will be the most suitable for him?

1. Cutting
2. Grafting
3. Layering
4. Micropropagation

Flowers borne on the shoot system of a plant serve as reproductive part. Which of the following reasons supports this statement ?

P. Flowers bear stamens and carpels.
Q. Flowers make the plant attractive.
R. Flowers produce fruits with seeds.

1. Only P
2. Only Q
3. Only P and R
4. Only Q and R

Cross-pollination is considered better than self-pollination because it produces healthier and more viable seeds. But it cannot occur by itself. Cross-pollination occurs with the help of certain agents like wind, water, insects, etc. Which of the following features of flowers are not suitable for insect-pollination ?

P. Flowers are usually small and of dull colours.
Q. Flowers are not scented and do not produce nectar.
R. Flowers produce sticky pollen grains.

1. Only Q
2. Only Q and R
3. Only P and R
4. Only P and Q

Assertion (A): The edible portion of potato plant is the root as it grows and develops under the soil.

Reason (R): The root is swollen due to the storage of food material which is rich in starch.

1. Both A and R are true.
2. Both A and R are false.
3. A is true and R is false.
4. A is false and R is true.