Man and His Environment MCQs

20% of total water is in the form of frozen ice caps

80% is in the oceans

1% as freshwater lakes, streams, and rivers

10% is in canals

Wildlife

Forests

Natural gas

Land

Food cycle

Nutrient cycle

Dead-live cycle

None of these

Too much food is consumed

Not enough food is produced

Decayed nutrients are not returned to the ground

All of these

57%

20%

79%

30%

Oxygen 20%, CO2 0.03%

Oxygen 50%, CO2 50%

Oxygen 30%, CO2 0.05%

Oxygen 25%, CO2 0.02%

25-30%

70-90%

10-30%

30-50%

5%

11%

21%

31%

All plants of the world

All non-cultivated plants

Nondomesticated animals

Both B and C

Dangerous for the life of humans

Reduced in number

Already extinct

All of these