The instrument which can be used to demonstrate geotropism is:

1. Manometer
2. Thermostat
3. Clinostat
4. Barometer

The hormone which accelerates senescence (ageing) and abscission of leaves is :

1. IAA
2. GA₃
3. ABA
4. GA₁

Assertion (A): Plants do not have sense organs but they can still respond against different stimuli.

Reason (R): 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 (A): Parthenocarpic fruits contain a large number of smaller seeds.

Reason (R): The process of development of fruits without fertilization is termed as parthenocarpy.

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.