Vegetative propagation involves the growth and development of 'something' present in the old part of the plant to form a new plant. What is this 'something'?

Name one commonly used vegetable which is propagated by using tubers.

What is meant by vegetative propagation ?

Why do green grass plants spring up in dry fields on their own after the rains ?

Explain how, new Bryophyllum plants can be produced from the leaves of the old plant ? Illustrate your answer with the help of a labelled diagram.