Question

Fill in the blanks and give reasons. 

i) ……… are the respiratory organs of fish. 

ii) In a cockroach, a network of ……… is found. 

iii) ……… are found on leaves for the exchange of gases.

Answer 1

i) Gills 

ii) respiratory tubes 

iii) Stomata 

i) Reason: The gills absorb the oxygen that is dissolved in the water. 

ii) Reason: Respiratory tubes help the cockroach to breath. 

iii) Reason: Exchange of air in leaves takes place continuously through stomata.