Match List I with List II.
List I | List II | ||
A | Taenia | I | Nephridia |
B | Paramoecium | II | Contractile vacuole |
C | Periplaneta | III | Flame cells |
D | Pheretima | IV | Urecose gland |
Choose the correct answer from the options given below:
In the given figure, which component has thin outer walls and highly thickened inner walls?