(a) What is meant by 'sowing' ? What are the various methods of sowing the seeds ?
(b) What precautions should be taken in sowing the seeds ?
are there seeds for mushroom plants?
1. What is osmosis ?
2. What is meant by DNA ?
3. What is meant by cell membrane?
What is meant by human circulatory system? What is meant by the term"single circulation" and "double circulation "