Practice Ecology and environment awareness - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) 'Project Tiger' in India was started in
(a)
(b)
(c)
(d)
Q-2) Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?
(a)
(b)
(c)
(d)
It feeds upon grains hence called primary consumer and can also feed on insects hence called secondary consumer at the same time in the same ecosystem.
Q-3) Which most often limits the primary productivity of the ecosystem ?
(a)
(b)
(c)
(d)
Q-4) Which of the following is the most stable ecosystem?
(a)
(b)
(c)
(d)
2/3 parts of each is ocean here, various types of food chains form food webs. This ecosystem is most stable due to buffering action of water.
Q-5) Habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction are causes for
(a)
(b)
(c)
(d)
Q-6) Which one is nature's cleaner ?
(a)
(b)
(c)
(d)
Q-7) Which of the following animal has become almost extinct in India ?
(a)
(b)
(c)
(d)
Q-8) Which is not a part of atmosphere ?
(a)
(b)
(c)
(d)
Because edaphic factors affects through soil and rest are the climatic factors.
Q-9) The animals which occupy the same trophic level are
(a)
(b)
(c)
(d)
Q-10) Which National park is the new home of the Indian onehorned rhinoceros ?
(a)
(b)
(c)
(d)
Q-11) 10% law of flow of energy in ecosystem was proposed by
(a)
(b)
(c)
(d)
Lindeman proposed the 10% law of flow of energy in ecosystem. According to this law only 10% energy passed from one trophic level to other in a food chain.
Q-12) Which one of the following is an example of Ex-situ conservation?
(a)
(b)
(c)
(d)
Ex-situ conservation is the conservation of selected organisms in places outside their natural homes.
They include off-site collection and gene banks. In situ conservation, on the other hand, is the conservation of endangered species in their natural habitat.
Biosphere reserves, National parks, Wildlife sanctuaries and sacred groves all are examples of In situ conservation.
Q-13) Which one of the following is not a gaseous biogeochemical cycle in ecosystem ?
(a)
(b)
(c)
(d)
Phosphorus is mostly used as phosphate. Its reservoir pool is phosphate rocks while cycling pool is soil for terrestrial ecosystems and water for aquatic ecosystems.
Q-14) Deforestation causes
(a)
(b)
(c)
(d)
Q-15) Acid rain is caused due to increase in concentration of (in atmosphere)
(a)
(b)
(c)
(d)
The main precursors of acid rain are SO2 and NO2 in the atmosphere which form H2 SO4 (Sulphuric acid) and HNO3 (nitric acid) with H2O and these come down with rain.
Such rains are called acid rains.
Q-16) More than 70% of world’s freshwater is contained in
(a)
(b)
(c)
(d)
Three fourth the surface of the earth is covered by oceans which contain 97.5% of total water.
It is marine water with about 3.5% salt content only 2.5% is fresh water which occurs on land.
Most of this water (1.97%) occurs from frozen ice caps and glaciers, and 0.5% of fresh water occurs as groundwater.
Rivers and lakes contain 0.02%, soil 0.01% while the atmosphere possesses 0.001% of water as vapours.
Q-17) Human population growth ________.
(a)
(b)
(c)
(d)
The exponential growth model virtually describes the population explosion of humans.
Q-18) Which constituent of the atmosphere is likely to change if the forest cover is removed ?
(a)
(b)
(c)
(d)
Q-19) The age of pyramid with broad base indicates
(a)
(b)
(c)
(d)
Q-20) Green house gases include
(a)
(b)
(c)
(d)