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.

Assertion (A): Calyx is the outermost whorl of a flower which consists of large, fragrant and brightly coloured petals.

Reason (R): As petals are brightly coloured and fragrant, they can be noticed by insects easily and help in cross pollination.

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.

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