Chordata

Test paper-I
Q.1. State location and function-

i) syrinx

ii) operculum

iii)rete mirabile

iv) jacobson's organ

'''Q.2. Differentiate between the following-'''

i) lung and swim bladder

ii) physostomous and physoclystous swim bladder

iii)lamelliform and filliform gills

Q.3. Diagram showin the evolution of swim bladder in fishes.

Q.4 Explain accessory respiratory organs in the fishes.

Q.5. Diagram showing the evolution of air bladder and lungs.