Organisms And Population Question 241
Question: In recent years, there has been an increasing incidence of floods in the plains of northern India because [DPMT 1982, 83]
Options:
A) There has been an increase in annual rainfall
B) The rate of silting of dams has gone up
C) There has been increased deforestation in the catchment areas
D) Increased areas of land are being self-cultivated
Show Answer
Answer:
Correct Answer: B
Solution:
Steep slopes cause fast running water which results in erosion and do not permit the accumulation of humus so the soil becomes denuded.
In such soil plants cannot grow properly and vegetation changes into xerophytic vegetation.
In valleys humus accumulates, so they have luxuriant vegetation and slopes contain xerophytic plants.
BETA
