Q3) Answer the following in one sentence (Any 4). (4)
1. By which names is the desert region of Rajasthan known?
2. What is the average rainfall in the Amazon River Basin?
3. Which state in India is most urbanised?
4. Which rivers meet near Manaus in Brazil?
5. What is sex ratio?
Answers
Answer:
1. Thar Desert, also called Great Indian Desert, arid region of rolling sand hills on the Indian subcontinent
1. Thar Desert, also called Great Indian Desert, arid region of rolling sand hills on the Indian subcontinent. It is located partly in Rajasthan state, northwestern India, and partly in Punjab and Sindh (Sind) provinces, eastern Pakistan.
2 Rainfall in the lowlands typically ranges from 60 to 120 inches (1,500 to 3,000 mm) annually in the central Amazon basin (e.g., Manaus). On the eastern and northwestern margins of the basin, rainfall occurs year-round, whereas in the central part there is a definite drier period, usually from June to November.
3. Among major states, Tamil Nadu continues to be the most urbanized state with 48.4 percent of the population living in urban areas followed now by Kerala (47.7 per cent) upstaging Maharashtra (45.2 percent).
4. The Negro and Solimoes rivers join in front of the Brazilian city of Manaus to form the Amazon River.
5. The sex ratio is the ratio of males to females in a population. In most sexually reproducing species, the ratio tends to be 1:1. This tendency is explained by Fisher's principle. For various reasons, however, many species deviate from anything like an even sex ratio, either periodically or permanently.
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