UV-B
(1) Damages DNA and causes mutation
(2) Ageing of skin and damage to the skin cells and cause various types of skin cancer
(3) Inflammation of cornea, cataract
(4) All of these
Snow Blindness and cataract is caused by
(1) UV-A
(2) UV-B
(3) UV-C
(4) All of these
Soil Erosion and desertification least likely resulted in which of the following cases?
(1) Over Cultivation
(2) Unrestricted Grazing
(3) Deforestation, Poor Irrigation Practices
(4) Proper resource Utilization and Maintenance
Which of the following have come into wake of the green revolution?
(1) Organic Farming
(2) Water logging
(3) Soil salinity
(4) Both 2 and 3
Find the wrong one out.
(1) Due to increased urbanisation, desertification is the major problem.
(2) Irrigation without proper drainage of water leads to waterlogging in the soil, affects the crops
(3) Waterlogging affects the crops and hence the agriculture
(4) Waterlogging cause salt to go downwards
According to an estimate, almost…….
Forests have been lost in the tropics compared to only …… in the temperate regions.
(1) 20%, 10%
(2) 60%, 12%
(3) 40%, 1%
(4) 30%, 2%
Which of the following statements is not correct?
(1) At the beginning of the twentieth century, forests covered about 30% of the land of India
(2) By the end of the twentieth century, forest area shrunk to 21.54%
(3) According to National Forest Policy of India has recommended 33% forest cover for the plains.
(4) According to National Forest Policy India(1982) has recommended 76% forest cover for the hills
Which of the cultivation is responsible for deforestation?
(1) Slash and Burn Agriculture
(2) Jhum Cultivation
(3) Both A and B
(4) Cyclic Agriculture
Jhum cultivation causes deforestation in
(1) North western states of India
(2) South India
(3) North Eastern state of India
(4) North India
In Jhum cultivation, what is the probable fertiliser?
(1) Cow dung
(2) Ash
(3) Compost
(4) Cattle excreta