Assertion. Phosphorylation occurs in all organisms only during the process of respiration.

Reason. Photophosphorylation is the process during which ADP combines with inorganic phosphate (iP) and produces ATP.

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. Plants do not have sense organs but they can still respond against different stimuli.

Reason. Plants have well-developed nervous and hormonal systems which enable them to respond against sunlight, gravity and water, etc.

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. Auxin is a growth-retarding plant hormone.

Reason. Auxins are mainly synthesized in shoot apical meristems and young leaves.

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. Ethylene is the only hormone which is a gas at ordinary temperature.

Reason. It helps in the ripening of fruits and is produced in the roots.

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.