Environment & Biodiversity MCQs

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Earth Hour is a global event which is organized by WWF. On this day households and businesses turn off their non-essential lights and other electrical appliances for an hour to raise awareness towards the need to take action on climate change.

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The Least Developed Countries Fund (LDCF) was established in 2001 and is operated by the Global Environment Facility (GEF). It was established to support these countries work programme under the UN Framework Convention on Climate Change (UNFCCC).

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The trees of mangrove forest having
breathing roots, which are usually very large to stand in deep mud. The necessity of Mangrove having breathing roots is to obtain oxygen from the atmosphere, while the soil in which mangroves grow are poor in oxygen.

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Cellulose for industrial use is mainly obtained from wood pulp and cotton. Cellulose is the major constituent of paper, paperboard, and card stock. It is also the main ingredient of textiles made from cotton, linen, and other plant fibres. It can be turned into rayon, an important fiber that has been used for textiles since the beginning of the 20th century.

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Basel Convention is an international treaty that was designed to reduce the movements of hazardous waste between nations, and specifically to prevent transfer of hazardous waste from developed to less developed countries (LDCs). It ultimately aims at biodiversity conservation.

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Lichens are used as air pollution indicators, especially of the concentration of Sulphur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrubby, hairy and leafy lichens become abundant.

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In ecology, the trophic level is the position that an organism occupies in a food chain – what it eats, and what eats it. Ecosystem represents the most complex trophic level. Each species in an ecosystem is affected by the other species in that ecosystem. There are very few single prey-single predator relationships. Most prey are consumed by more than one predator, and most predators have more than one prey. It is also marked by multi trophic interactions that involve more than two trophic levels in a food web.

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Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem composition.

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If the environmental lapse rate is greater than – 5.5 K/km, then there is some small amount of vertical turbulence and the atmosphere is said to be stable. It is also referred to as being sub-adiabatic.

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Shark Bay is an outstanding World Heritage Site located in Western Australia. It covers 2.2 million hectares showcasing gorgeous natural beauty and biodiversity, with 70% being marine waters. Known for its world’s largest collection of marine stromatolites, it plays host to threatened species like dugongs. The protected Bernier and Dorre islands are free from non-native animals. The site comprises France Peron National Park and Hamelin Pool Marine Nature Reserve. Its climate is semi-arid with hot summers and mild winters, and the coastline extends over 1,500km. Shark Bay was included in the World Heritage list in 1991 for its rich biodiversity and exemplary natural aesthetics.