The northern slopes of the hills in Himalayan region are at high altitude and have low temperature or are snow covered. This does not allow much vegetation. In the southern part of the hills there are plains and valleys watered by rivers and with fertile soil and pleasant temperature levels all required for dense growth of vegetation.

The westward facing slopes receive much more rain than the eastward facing slopes and the Western Ghats are considerably wetter than the dry Deccan to the east.

To which one of the following types of vegetation does rubber belong to?
(a) Tundra 

(b) Himalayan 

(c) Tidal 

(d) Tropical Evergreen

ANS (d) Tropical Evergreen

Cinchona trees are found in the areas of rainfall more than:
(a) 100 cm
(b) 70 cm
(c) 50 cm
(d) Less than 50 cm
ANS (a) 100 cm

In which of the following states is the Simplipal bioreserve located?
(a) Punjab
(b) Delhi
(c) Orissa
(d) West Bengal
ANS (c) Orissa

Which one of the following bio-reserves of India is not included in the world network of bioreserve?
(a) Manas
(b) Gulf of Mannar
(c) Sunderbans
(d) Nanda Devi
ANS (a) Manas

All the plants and animals in an area are interdependent on each other. The plants and animals, alongwith their physical environment make the ecosystem. Interrelation between plants and animals in the natural environment is called Ecosystem.

Factors responsible for the distribution of plants and animals in India are:

(a) Relief: Land and soil
(b) Climate: Temperature, Humidity, Photoperiod and Precipitation.