Biology
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.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Related Questions
Assertion. Parthenocarpic fruits contain a large number of smaller seeds.
Reason. The process of development of fruits without fertilization is termed as parthenocarpy.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- 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.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. Human beings have an open blood vascular system.
Reason. Blood is contained in the heart and openly flows all throughout the body via three kinds of blood vessels — arteries, veins and capillaries.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. The wall of left ventricle is thicker than the wall of right ventricle.
Reason. The left ventricle must generate enough force to pump oxygenated blood to the entire body, so it has thicker muscular walls compared to the right ventricle, which pumps blood to the lungs.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.