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.

Assertion (A): Ethylene is the only hormone which is a gas at ordinary temperature.

Reason (R): 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.

Assertion (A): Human beings have an open blood vascular system.

Reason (R): Blood is contained in the heart and openly flows all throughout the body via three kinds of blood vessels — arteries, veins and capillaries.

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.