Differentiate between the following on the basis of what is given in brackets:

(i) Myopia and hypermetropia (condition of eyeball)

Briefly explain the following terms:

(v) Natural immunity 

Differentiate between the following on the basis of what is given in brackets:

Tonoplast and plasma membrane (location)

Name any two microbes which cause diseases in man. In each case, give an example of diseases caused by them.

Differentiate between the following on the basis of what is given in brackets:

DPT and BCG (expanded form of the vaccine)

Differentiate between the following on the basis of what is given in brackets:

Wall pressure and turgor pressure (explain briefly)

Explain the following terms:
(1) Mutation

Mention three reasons why the growth of population has not been appreciably checked in India.

Mention any three functions of the Red Cross.

Differentiate between the following on the basis of what is given in brackets:

Rods and cones (pigment present)