Briefly explain the following terms:
(v) Natural immunity
Natural immunity is the immunity which one inherits from one's parents. It is by virtue of the genetic constitution of the body.
Mention three reasons why the growth of population has not been appreciably checked in India.
Differentiate between the following on the basis of what is given in brackets:
(i) Myopia and hypermetropia (condition of eyeball)
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:
Tonoplast and plasma membrane (location)
Differentiate between the following on the basis of what is given in brackets:
Wall pressure and turgor pressure (explain briefly)
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:
Rods and cones (pigment present)
