Assertion : Gill-lamellae in aquatic animals help in exchange of gases
Reason : Each gill lamella carries many blood capillaries.
Assertion : In mammals, complex respiratory system has developed.
Reason : Mammalian skin is impermeable to gases.
Assertion : Insects develop a complex system of air tubes called trachea for respiratory purpose.
Reason : Exchange through body surface is not possible in insects.
Assertion : Abdominal muscles is related with respiration in animals.
Reason : Relaxation of abdominal muscles draws in air.
Assertion : Aerobic respiration involves the exchange of respiratory gases twice.
Reason : Exchange occurs from lung to heart and then heart to lung.
Assertion : Blood of insects is colourless
Reason : The blood of insect does not play any role in transport of oxygen.
Assertion : In mollusca, circulatory system is of closed type.
Reason : The blood of mollusca contains haemoglobin
Assertion : Histamine is involved in allergic and inflammatory reactions.
Reason : Histamine is a vasodilator
Assertion : Severe Acute Respiratory Syndrome (SARS) originated in China.
Reason : China is the most populated country of the world
1. Both Assertion (A) and Reason (R) are the true and Reason (R) is a correct explanation of Assertion (A).
2.Both Assertion (A) and Reason (R) are the true but Reason (R) is not a correct explanation of Assertion (A).
3.Assertion (A) is true and Reason (R) is false.
4. Assertion (A) is false and Reason (R) is true
Which of the following is true about respiration
(1)it is for energy liberation
(2)it can occur both O2 presence and its absence
(3)In humans R.B.C show anaerobic respiration
(4)All of these