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1) Environmental studies is defined as the branch that deals with the:

Design, study, and discovery of new materials.
The study of humanities, social, biological, and physical sciences.
Incorporate the information and physical sciences.
Approach about the natural world and the impact of humans on its integrity.

Answer: (d) Approach about the natural world and the impact of humans on its integrity.

Explanation: Environmental studies deal with the issues that affect the life of a living organism. It can be various factors that relates to the natural world and the human impact on it.

The other three options are related to material science, general studies, and environmental science.

2) Which of the following statement about the Zoological Survey of India (ZSI) is true?

It was established in 1890 at the Royal Botanical Gardens, Calcutta.
It is the first crocodile conservation breeding center in Asia.
It was established in 1916 to do an organized survey of fauna in India.
It was established in 1982 for research in Wildlife Management.

Answer: (c) It was established in 1916 to do an organized survey of fauna in India.

Explanation: Zoological Survey of India was established on July 1, 1916. It was founded to promote the research and survey of the fauna in India. ZSI has millions of specimens till date. The collection of specimens by the ZSI is considered the largest collection in Asia.

3) Which layer of the atmosphere contains the ozone responsible for the absorption of UV (Ultra-Violet) light?

Stratosphere
Troposphere
Mesosphere
None of these

Answer: (a) Stratosphere

Explanation: The ozone present absorbs UV light in the stratosphere. It is the most important aspect of the atmosphere that makes life possible on Earth.

4) The estimated percentage of the forest land that ideally India should have is:

Answer: (c) 33%

Explanation: India has a current forest land of about 12%. The ideal forest land area is 33%, while in hills and mountains it is around 45%. It means the estimated forest land in mountains and hills should e two-third. Thus, India needs to increase the forest land to increase the forest cover.

5) Which two countries of the world constitute about 57% of the large dams?

India and China
India and Brazil
China and Brazil
India and Japan

Answer: (a) India and China

Explanation: The dams act as a storage space for floods. It reduces the effect of the flood on millions of people. It is also suggested that around 40% of the irrigated land depends on dams.

6) The essential non-metallic minerals are:

Granite, marble, limestone
Gold, silver, platinum
Iron, aluminum, zinc, copper
Coal, clay, cement, silica

Answer: (d) Coal, clay, cement, silica

Explanation: Non-metallic minerals do not have metals or fuel as their source.

7) Integrated Crop Management is defined as a process to:

Use the traditional methods for growing crops.
Using alternatives to inorganic fertilizers and pesticides.
Both (a) and (b)
None of the above

Answer: (c) Both (a) and (b)

Explanation: The usage of traditional growing crop methods lowers the chance of complete failure of the crops. The research and studies have also shown that using alternatives to inorganic fertilizers and pesticides can also reduce crop failure chances. It is defined as Integrated Crop Management.

8) Which three edible plant species constitute about 60% supply of the world's food energy intake?

Wheat, Barley, Oat
Wheat, Rice, Maize
Wheat, Barley, maize
None of these

Answer: (b) Wheat, Rice, Maize

Explanation: The three essential edible species that constitute about 60% of the world's food energy intake are wheat, rice, and maize. The large producers of these three edible species in India are Uttar Pradesh, West Bengal, and Madhya Pradesh.

9) Which of the following is not a measure of sustainable water management?

Preventing leakage from dams and canals
Reducing the rate of surface run-off water.
Preventing loss in the municipal pipes.
Building small reservoirs in place of a few mega projects.

Answer: (b) reducing the rate of surface run-off water.

Explanation: The reduction of the surface run-off water rate is the function of the forest. The role of sustainable water management is to organize campaigns to increase awareness of water scarcity.

10) Which element is considered the largest source of world's commercial energy consumption?

Coal
Oil
Natural gas
Nuclear

Answer: (b) Oil

Explanation: Coal was the largest energy source round the 19th century. But, today, oil is considered the largest source of commercial energy consumption. It constitutes around 39%. Coal has a percentage of energy consumption around 24%.

11) What are the two forms of alcohol are included in biofuels?

Ethanol and methanol
Ethanol and propanol
Methanol and propanol
None of the above

Answer: (a) Ethanol and methanol

Explanation: Biofuels or liquid fuels use two forms of alcohol namely ethanol and methanol.

12) What is the world's largest potential source of biomass energy?

Animal waste
Industrial waste
Fibrous waste of the paper industry
Fibrous waste of the sugar industry

Answer: (d) Fibrous waste of the sugar industry

Explanation: Fibrous waste is a by-product that is obtained after the juice is extracted from the sugar cane. It is also termed as Bagasse.

13) The functional aspects of the ecosystem are:

Energy cycles
Nutrient cycles
Food chains
All of the above

Answer: (d) All of the above

Explanation: The Ecosystem comprises of the living and non-living parts that are linked to each other. The functional aspects of the ecosystem are nutrient cycles, food chains, and energy cycles.

14) Which of the following is also called Detrivores?

Herbivores
Decomposers
Carnivores
None of the above

Answer: (b) Decomposers

Explanation: Decomposers are the group of small animals, such as bacteria, worms, etc. It breaks down the dead organic material into simple smaller substances.

15) What are 'keystone' species in an ecosystem?

The species whose elimination can seriously affect the ecosystem.
The species whose elimination can benefit the ecosystem.
The species whose elimination would not affect the ecosystem.
None of the above

Answer: (a) The species whose elimination can seriously affect the ecosystem.

Explanation: Extinction occurs due to various human activities, such as deforestation, draining wetlands, etc. The elimination of some species can harm the ecosystem. Such species are called keystone species.

Hence, the correct answer is an option (a).

16) Which of the following activity is incorrect about the impact of human activities on the ecosystem?

Depletion of ground water
Extinction of species
Decrease of forest area
None of the above

Answer: (d) None of the above

Explanation: The ecosystem is disrupted due to human activities, which results in the depletion of ground water, extinction of species, d

Evs Questions For Bba Mcq