76: Assertion (A) :
Areas near the equator receive rainfall throughout the year.
Reason (R) :
High temperatures and high humidity cause convectional rain in most afternoons near the equator.
In the context of the above two statements, which one of the following is correct ?
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Explanation:
These areas near equator are called Tropical Rain Forest regions. Here generally the type of rainfall is convectional rainfall, because of constant high temperature and high humidity produces rainfall almost daily in the afternoon throughout the year.
77: Himalayan rivers are perennial because:
(a) They flow from inexhaustible springs in the Himalayas
(b) They are fed in summer by melting snow of Himalayas
(c) There is continuous rain throughout the year in the catchment areas
(d) None of the above
78: Among the following States, which one has the most suitable climatic conditions for the cultivation of a large variety of orchids with minimum cost of production, and can develop an export oriented industry in this field?
(a) Andhra Pradesh
(b) Madhya Pradesh
(c) Arunachal Pradesh
(d) Uttar Pradesh
Explanation:
Arunachal Pradesh is considered to be the "nature's treasure trove" and home to orchids, known for their exquisitely beautiful blooms, from one of the dominant taxa with more than six hundred species, occurring in varying elevations and climatic conditions throughout the state. The state has a wonderful world of orchids that have adorned the forests making the state an "Orchid Paradise" of our country.
In India, there are about 1,150 species distributed in various states. However, Arunachal Pradesh alone accounts for 601 species - almost 52% of the total species known in India, thus making Arunachal an "Orchid Paradise" of our country. Many of these species are rare, endangered, and ornamental. Because of the curious shape, brilliant colour and long-lasting quality of flowers, orchids are considered as "gems" in the field of floriculture.
79: Which one of the following countries is land locked?
(a) Bolivia
(b) Peru
(c) Suriname
(d) Uruguay
Explanation:
Bolivia is land locked among Brazil, Peru, Chile, Argentina and Paraguay.
80: Why is there a severe difference in the climates of Northern and Southern Hemisphere?
(a) Due to rotation of the earth around its axis
(b) Due to revolution of the earth around the sun of its orbit
(c) Both of the above
(d) None of the above