CBSE Questions for Class 10 Biology Sustainable Management Of Natural Resources Quiz 1 - MCQExams.com

• Groundwater is considered the major source of freshwater. 
• More than sixty-eight percent of the fresh water on the Earth is brought into being in icecaps and glaciers and is considered as the largest freshwater 'reservoir' and over thirty percent is found in groundwater and this is used for drinking and other life purposes. 

• Renewable sources of energy include and some forms of inexhaustible energy like solar energy, hydropower, wind power, tidal energy, wave energy, geothermal energy, etc. 
• Solar energy is a universal, inexhaustible, non-conventional resource, which is non-polluting. It is considered universal because solar energy is available in all places and it does not lead to any type of pollution. 
• So, the correct answer is option B.

• Arabari is the name of a forest range in the West Midnapore district of West Bengal, India contiguous with the Dalma range of East Singhbhum, Jharkhand. 
• The predominant tree of the forest is sal (Shorea robusta). A number of elephants also travel down from the Dalma range into Arabari and often encroach and attack villages in West Midnapore. 
• The forest can be classified as part of the Upper Gangetic Plains moist deciduous forests. 

• Ganga is a very important river in North India. In fact, it is an international river that also flows through parts of Bangladesh. 
• In India, it is not only a river but is worshipped as a goddess by a large section of people. It is considered a very important part of our history, culture, and civilization. 
• In recent years the river has suffered a lot of pollution. The Ganga action plan or GAP was a program launched in January 1986 in order to reduce the pollution load on the river. 
• But, the efforts to decrease the pollution level in the river were unsuccessful even after spending a large amount of money. Therefore, this plan was withdrawn on 31 March 2000.

$$\textbf{Correct option: }$$ C

$$\textbf{ Solution: }$$

$$\textbf{ Option (C): }$$

$$\bullet$$The loss of species can result in serious consequences like the disturbance in the food chain. 

$$\bullet$$Every species has its specific role in the ecosystem which is hampered by its extinction. 

$$\bullet$$The loss of wildlife species can also result in the loss of gene pool in the ecosystem. 

$$\bullet$$This loss of genes and its allele cannot be recovered or formed artificially by humans

Hence, the correct option is (C).

Building big dams or raising their height have always been controversial issues. India is a fast-growing economy and the requirement for energy is increasing manifold. However, we are deficient in oil and gas resources. Our known coal deposits are lacking both in quantity and quality. Nuclear power is not entirely safe and may lead to radiation pollution. Further, there are many restrictions on the usage of nuclear technology and it is very expensive. 

In such a scenario, raising the height of existing dams for storing more water to generate more pressure for generating hydroelectricity can be considered as an alternative, but that comes with its share of challenges.

Raising the height of dams, for instance, will permanently submerge vast tracts of land. This will result in the dislocation of native people, permanent loss of indigenous plants and animals, and permanent farmland destruction. 

So, if any dam is to be raised in height, all aspects should be carefully considered, such as the reestablishment of local tradition, considerations for biodiversity protection, etc.

• Fuelwood or firewood is a renewable conventional resource used for cooking and heating in villages, remote areas, crematoria, etc. 
• More than 2 billion persons use wood as fuel. In India, the annual consumption of firewood is around 300 million per cubic meter with natural availability being only 60 million per cubic meter. 
• To overcome the shortage and fulfill the demand, excessive trees are cut down leading to deforestation. 
• Fuelwood crisis can be resolved by using alternate or non-conventional sources of energy like solar, wind, tidal, or biogas energy.