Exchange of Gases in Fishes

Q.

Book lungs are respiratory organs of

1. Mollusca

2. Arachnida

3. Mammals

4. Earthworm

Q. Branchial respiration are found in

1. prawns
2. cyclostomes
3. Amphitrite
4. all of these

Q.

Water circulation in sponges does not help in:

1. Locomotion

2. Respiration

3. Food gathering

4. Removal of waste

Q. Branchial respiration is observed in:

1. Fishes
2. Molluscs
3. 
   Aquatic arthropods
4. 
   All of the above

Q.

Which of the following represents the countercurrent mechanism in fish?

1. 1

2. 2

3. 1 and 2

4. None of the above