Which of the following is entirely made of cartilage?
1. Nasal septum
2. Larynx
3. Glottis
4. Trachea
Assertion : Most fish when out of water, die of suffocation.
Reason : Atmospheric air contains far less oxygen content than the dissolved oxygen in water.
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.
Respiratory organ of scorpion is
(1)Book-lungs
(2)Book-gills
(3)Buccal cavity
(4)Lungs
Which of the following is incorrect
(1)Whale-Lungs
(2)Tadepole larva-Gills
(3)Earthworm-moist skin
(4)Spider-lungs
Which of the following is true regarding breathing rate
(1)It’s minimum in Whale/Elephant
(2)It’s is maximum in shrew
(3)more in child than an adult
(4)All of these
Which one is odd out regarding breathing rate
(1)heart beat rate
(2)B.M.R
(3)CO2 concentration
(4)Body size