Explain the differences between the following:

Autotrophs and Heterotrophs -

Explain the differences between the following:

Living and Non-living organisms -

Give reason :

In case of construction of building, we find every day the height of the building goes on increasing. Can it be called a living being? 

Give reason :

Speed is important for the survival of animals that live in grasslands.

Give reason :

Stomata are important for the leaves. 

Identify and name the characteristic of life which expressed in bold :

The crow lays eggs in its nest.

Identify and name the characteristic of life which expressed in bold:

Pooja has grown taller than her mother.

What do you understand by excretion?