Pick the odd one out.

Which crop is the chief source of food for more than half people of the world ?

Which part of the plant makes food ?

Which gas is given out by the plants ?

What protects the seed ?

Which of these produces fruit?

What is a minute pores in a leaf called ?

What is the part of a plant below the soil called ?

Which of these has compound leaves?

What grows in to a new plant ?