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c) Mulching
d) wet points
7) Which of the following is called as water planet:
a) Mercury
b) Earth
c) Jupiter
d) Venus
8) Life on the Earth began almost about _________________years back:
a) 3.5 billion
b) 4 billion
c) 2.9 billion
d) 4.5 billion
9) Increasing population, rising demands for food and cash crops, increasing urbanisation and
rising standards of living are the major factors leading to ______________ in supply of fresh
water:
a) Increase
b) balance
c) Shortage
d) moderation
10) Only ____________________ per cent of freshwater is available and fit for human use.
a) 10 percent
b) 5 percent
c) 2 percent
d) 1 percent
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