ecology & bio environment geography section 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT indian geography mcq - 2 EXERCISES
The following question based on Ecology & Bio geography topic of indian geography mcq
(a) geological balance
(b) protecting wildlife
(c) raising precipitation
(d) absorption of carbon dioxide
The correct answers to the above question in:
Answer: (d)
Forests are considered as sinks of carbon dioxide. A carbon sink is anything that absorbs more carbon that it releases, whilst a carbon source is anything that releases more carbon than is absorb. It is for this reason that they are indispensable in the present global scenario marked by increasing global warming and climate change.
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Read more bio ecology environment Based Indian Geography Questions and Answers
Question : 1
In predation between
- A lion and a deer
- A snake and a frog
- A lizard and an insect and
- An owl and a rat
a) Lizard
b) Owl
c) Snake
d) Lion
Answer »Answer: (c)
There are different types of interactions in the biotic community. Frog feeds for snakes. Snakes are the main predators of frogs.
The control over a prey is determined by the level of competition faced by other predators. If the same prey is prey to other predators, the control is considered to be lesser.
Question : 2
Which one of the following is an abiotic and renewable resource?
a) forests
b) livestock
c) water
d) iron ore
Answer »Answer: (c)
In ecology and biology, abiotic components (also known as abiotic factors) are non-living chemical and physical factors in the environment, which affect ecosystems. Abiotic phenomena underlie all of biology.
From the viewpoint of biology, abiotic factors can be classified as light or more generally radiation, temperature, water, the chemical surrounding composed of the terrestrial atmospheric gases, as well as soil.
The macroscopic climate often influences each of the above. A renewable resource is a natural resource with the ability to reproduce through biological or natural processes and replenished with the passage of time. Renewable resources are part of our natural environment and form our ecosystem.
Question : 3
‘Green Accounting’ means measuring the National Income of the country taking into account estimation of
a) area of reclaimed fallow land
b) the destruction of forest cover of the country
c) pollution and environmental damage
d) the total forest area of the country
Answer »Answer: (c)
Green accounting is a type of accounting that attempts to factor environmental costs into the financial results of operations.
It has been argued that gross domestic product ignores the environment and therefore decision-makers need a revised model that incorporates green accounting.
Question : 4
Which one of the following is the correct sequence of ecosystem in the order of decreasing productivity?
a) Mangroves, grasslands, lakes, oceans
b) Mangroves, oceans, grassland, lakes
c) Oceans, lakes, grassland, mangroves
d) Oceans, mangroves, lakes, grassland
Answer »Answer: (a)
Productivity is the rate of organic matter or biomass production. The average ocean productivity is about 50 grams of carbon per square meter per year; while, the average land productivity is 160 grams of carbon per square meter per year.
Salt marshes and mangroves have one of the highest productivity of 3300-6000 grams of carbon per square meter per year.
So the correct sequence of the ecosystem in the order of decreasing productivity is:
Mangroves > Grasslands > Lakes > Oceans.
Question : 5
'Green House Effect' means
a) Cultivation in green houses so as to check pollution
b) Trapping of solar energy due to atmospheric oxygen
c) Trapping of solar energy due to atmospheric carbon dioxide
d) Pollution in houses in tropical regions
Answer »Answer: (c)
The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases such as Carbon dioxide, and is re-radiated in all directions.
Since part of this re-radiation is back towards the surface and the lower atmosphere, it results in an elevation of the average surface temperature above what it would be in the absence of the gases. Human activities, primarily the burning of fossil fuels and clearing of forests, have intensified the natural greenhouse effect, causing global warming.
Question : 6
Which one is not a non-conventional energy source?
a) Tidal power
b) Solar Energy
c) Wind energy
d) Nuclear energy
Answer »Answer: (d)
Energy generated by using wind, tides, solar, geothermal heat, and biomass including farm and animal waste as well as human excreta is known as non-conventional energy. All these sources are renewable or inexhaustible and do not cause environmental pollution. Moreover, they do not require heavy expenditure.
Nuclear energy usually means the part of the energy of an atomic nucleus, which can be released by fusion or fission or radioactive decay.
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