An iron nail is placed in copper sulphate solution taken in the beaker. Observe it for some time ? Find the changes that takes place and why ?

Can conversation take place in soilds? Why?

Why Abscission has to take place?

Assertion (A): Zinc metal when placed in copper sulphate solution, zinc turns brown. Reason (R): Due to metal displacement reaction, copper sulphate reacts with zinc, Cu gets deposited over zinc and so it turns brown.

During menstrual cycle the cyclical changes takes place in:

List out the changes which take place during gene expression.

During the process of ecological succession, the changes that take place in communities are