Energy is required for
all the activities of life; in animals from where does this energy come?
a) sunlight
b) electrical sources
c) food
d) water
Explanation: chemical energy in the form ATP
Which of the following gas is used in aerobic respiration?
a) carbon dioxide
b) oxygen
c) nitrogen dioxide
d) chlorine
Which of the following gas is evolved during aerobic respiration?
a) carbon dioxide
b) oxygen
c) nitrogen dioxide
d) chlorine
In less complex animals, oxygen is absorbed through……
a) gills
b) entire exposed surface of the body
c) lungs
d) both a and c
Explanation: Earthworms breathe through their skin. Frogs, when present in water, breathe through their moist skin. This kind of exchange of gases is called as cutaneous respiration. In insects like cockroaches, breathing takes place through a network of fine tubes called tracheae.
In higher complex animals, oxygen is absorbed through……
a) gills
b) entire exposed surface of the body
c) lungs
d) both a and c
Explanation: fishes by gills and higher animal by lungs
Properties of Respiratory Surfaces
