Xylem tissue forms a tubular passage to transport water and mineral salts from the roots to the aerial parts of a plant. It consists of different types of cells.

P. Sieve tubes and companion cells
Q. Wood parenchyma and wood fibres
R. Tracheids and vessels

Which of the following are xylem components?

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

Assertion (A): The food prepared by leaves is transported to all parts of the plant.

Reason (R): Roots are the underground parts of the plant which absorb food material from the soil.

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): The movement of molecules from their lower concentration to a higher concentration requires energy in the form of ATP.

Reason (R): Active transport is the process during which root hairs of a plant absorb minerals from the soil.

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): Nitrogen is the main constituent of all proteins which helps in the growth and development of plants.

Reason (R): Nitrogen is micronutrient, which means it is required in very small amounts by the plants. It is absorbed from the soil as a nutrient element or mineral.

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.