Mention three reasons why the growth of population has not been appreciably checked in India.
The growth of population has not been appreciably checked in India because of the
following reasons:
1. Illiteracy and ignorance which makes people unaware about the importance of a small family.
2. Most of the Indian families hold the view that the male child is essential for the
family. Therefore, in order to get a son, such families have several children.
3. Better health care and large scale immunization provides better chances of survival.
Differentiate between the following on the basis of what is given in brackets:
Rods and cones (pigment present)
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:
Tonoplast and plasma membrane (location)
Differentiate between the following on the basis of what is given in brackets:
DPT and BCG (expanded form of the vaccine)
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:
Wall pressure and turgor pressure (explain briefly)
