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): Carrot is a biennial plant which stores food material in its roots in the first year.

Reason (R): This food is utilized in the second year to produce flowers and viable seeds, i.e. to reproduce sexually.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Assertion (A): Micropropagation is the propagation or multiplication of plants by a special technique called 'tissue culture'.

Reason (R): It is called 'micropropagation' because this technique is applicable to micro-organisms only.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Assertion (A): Vallisneria shows a special adaptation for hydrophilous pollination.

Reason (R): Its male flowers get detached from the plant and float freely until they reach and make physical contact with the female flowers at the water surface.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.