Environment & Biodiversity MCQs

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Nanotoxicology is defined as the study of the toxicity of nanomaterials. nanomaterials have unique properties as compared to their larger counterparts because of the large surface area to volume ratio of nanomaterials. Inhalation exposure is of most concern because of its quantum size.

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The Aghanashini River forms its estuary in Kumta taluka of Uttara Kannada district, Karnataka. Uttara Kannada is a coastal district in Karnataka known for its estuaries and rivers draining into the Arabian Sea. The estuary is located specifically within this district’s geographical area.

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Ecotype is the basic unit of Biosystematics. It is adapted to a particular environment but capable of producing fully fertile hybrids with other ecotypes. The term Ecotype proposed by Turesson refers to “an ecological unit to cover the product arising as a result of genotypical response of an ecospecies to a particular habitat.”

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The conference was held in Stockholm, the capital of Sweden, in 1972. The conference is widely recognized as the beginning of modern political and public awareness of global environmental problems.

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Water is one of the abiotic factors that are nonliving chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems. They affect living organisms in terms of growth, maintenance, and reproduction. A biotic factor is any living component that affects the population of another organism, or the environment.

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Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals wood, alkaloids, latex obtained from plant are also biotic resources. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.

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Checking atomic blasts will reduce radioactive pollution. Sewage pollution can be prevented by treating sewage before passing into water course, in sewage treatment plant or effluent treatment plant (ETP). Electrically operated vehicles will control automobile exhaust and improve the air quality in cities. Environmental pollution can be controlled by treating factory wastes before disposing of them. So, if we treat wastewater before disposing of in a river, it will surely decrease the amount of dumped pollutants. For example- Steel industries have a high concentration of cyanide in it, and it led to harmful effect. So, treatment is really necessary.

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The greenhouse effect is the process by which radiation from a planet’s atmosphere warms the planet’s surface to a temperature above what it would be without its atmosphere. It caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the air.

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Sikkim is the largest producer of orchids in India. The state is home to an amazing 450 species of exotic orchids alone. Annually, around 20 million stalks of orchids are produced in Sikkim. Sikkim, owing to its climatic conditions, has developed as a natural hub of orchids.

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Glover’s Reef is a part of The Belize Barrier Reef Reserve System, a UNESCO World Heritage Site since 1996. This is the world’s second largest reef system, extending 300 km along the coast of Belize. It’s a host to seven protected areas inclusive of three atolls: Turneffe, Lighthouse, and Glover’s Reef. The complex supports 1,400 known species, among them 17 endangered ones such as the American crocodile, manatee, and different sea turtles. The system, notable for its pristine condition, was deemed by Charles Darwin as the “most remarkable reef in the West Indies”.