Questions

The process which wherein an Ecosystem may renew itself is known as Ecological Succession.

The time scale may be decades or a million of years after a mass extinction. 

It may be achieve over a period of time.

In human body, glucose is stored in blood stream before it is converted to glycogen. Excess glucose is stored in the form of fats. After conversion, glycogen is stored in Muscles and Liver.

Intersection method of expressing direction is indicated in the illustration.

Speed in a given direction is called Velocity.

The "City of Wars" is Panipat because three battles were done in panipat.

It gets contaminated by lead

A colored ion generally indicates a transition metal.

Sir Francis Drake was the first Englishman to sail around the world.