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Biogeography - GK Questions and Answers for competitive exams on Geography | page-17

81 How many physical states of water are there ?
A one
B Two
C Three
D Four

Answer: Option [C]

The correct answer is Three. Water can exist in 3 different physical states – solid, liquid, and gaseous. In the solid state, water exists in the form of ice or snow. In the gaseous state, water exists as water vapour or steam.

82 Which one of the following is one of the primary producers ?
A Diaforms
B Catfish
C Insects
D Snails

Answer: Option [A]

The correct answer is Diaforms. Diatoms are one of the major primary producers in the ocean, responsible annually for ~20% of photosynthetically fixed CO2 on Earth.

83 How much area of the earth is covered by the aquatic ecosystems ?
A 50%
B 71%
C 75%
D 92%

Answer: Option [B]

The correct answer is 71%. Covering 71% of the Earth’s surface, aquatic biomes are the largest of all the biomes on the Earth. An aquatic biome is a group of living organisms that live and interact with one another and its aquatic environment for nutrients and shelter.

84 Where is the Prairie grass found ?
A North America
B Sub-Saharan Africa
C Northern Eurasia
D South America

Answer: Option [A]

The correct answer is North America. The Great Plains, which is located in the central part of North America, contains the largest prairie in the world.

85 Which one of the following is the permissible noise level of silence zones in India at India ?
A 60 dB
B 55 dB
C 50 dB
D 50dB-40dB

Answer: Option [D]

The correct answer is 50dB-40dB. Permissible limits for noise in silence zones are 50dB during day time and around 40dB during night time, these are also ranges from 100 km from the hospital and education institutes.


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