I

6 X  +  6 H\(_2\)O      →     C\(_6\)H\(_{12}\)O\(_6\)   +   6O\(_2\) 

 III               chlorophyll      II               IV

Use the diagram above to answer question that follows

The part labelled I is

Bilateral symmetry,cylindrical bodies and double openings are characteristic features of

Mouth part adapted for piercing and sucking is found in

The web-feet of frogs and toads is basically for 

The part of the inner ear that is responsible for hearing is