Static Quiz 17 April 2024
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Static Quiz 17 April 2024 for UPSC Prelims
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- Question 1 of 5
1. Question
Which of the following is recognized as the world’s largest single structure created by living organisms and is also a World Heritage site?
CorrectCorrect Answer : D
Answer Justification : The Great Barrier Reef is the world’s largest coral reef system, comprising over 2,900 individual reefs and 900 islands, spanning approximately 2,300 kilometers over an area of about 344,400 square kilometers. Situated in the Coral Sea off the coast of Queensland, Australia, the Great Barrier Reef is visible from space and stands as the world’s largest structure created by living organisms.IncorrectCorrect Answer : D
Answer Justification : The Great Barrier Reef is the world’s largest coral reef system, comprising over 2,900 individual reefs and 900 islands, spanning approximately 2,300 kilometers over an area of about 344,400 square kilometers. Situated in the Coral Sea off the coast of Queensland, Australia, the Great Barrier Reef is visible from space and stands as the world’s largest structure created by living organisms. - Question 2 of 5
2. Question
What is/are the ecological contributions of Coral Reefs?
(1) They support fish production by providing them with food and shelter.
(2) They regulate the concentration of carbon dioxide in the lower atmosphere and in the seawater.
(3) They act as natural barriers, protecting coastal areas from sea waves.
(4) They exhibit the highest primary productivity among all marine ecosystems.
Select the correct answer using the codes below.CorrectCorrect Answer: B
Justification :
Statement 2: Coral reefs help control the Green House Effect by absorbing excess CO2 through calcification, thereby reducing the amount of carbon dioxide in the atmosphere. Statement 3: They serve as the first line of defense against tsunamis, cyclones, and sea waves by mitigating their force.
Statement 4: They possess the highest primary productivity WITHIN the marine environment. Estuaries, however, have the highest primary productivity overall.IncorrectCorrect Answer: B
Justification :
Statement 2: Coral reefs help control the Green House Effect by absorbing excess CO2 through calcification, thereby reducing the amount of carbon dioxide in the atmosphere. Statement 3: They serve as the first line of defense against tsunamis, cyclones, and sea waves by mitigating their force.
Statement 4: They possess the highest primary productivity WITHIN the marine environment. Estuaries, however, have the highest primary productivity overall. - Question 3 of 5
3. Question
The Tamil Nadu government, in collaboration with IIT Madras, has initiated the restoration of Vaan Island in the Gulf of Mannar using:
CorrectCorrect Answer: C
Justification: Vaan Island, situated 2 km off the Tuticorin coast in Tamil Nadu, is one of 21 uninhabited islands in the Gulf of Mannar. The primary aim is to curb erosion and facilitate coral rehabilitation in the surrounding areas. Due to rampant coral mining and rising sea levels, the island has suffered considerable damage over the years. This project marks India’s first effort to protect and restore a sinking island, funded by the National Adaptation Fund for Climate Change (NAFCC) under the Ministry of Environment, Forests and Climate Change (MoEFCC).
Learning: The Gulf of Mannar Biosphere Reserve, Asia’s first marine biosphere reserve, is located in the Southern Bay of Bengal. Covering an area of 10,500 sq. km, the reserve consists of 21 islands with continuous stretches of coral reef. The reserve is home to globally endangered species such as the dugong, various dolphin and whale species, and three endangered sea turtle species. It is also a part of UNESCO’s Man and Biosphere (MAB) program.IncorrectCorrect Answer: C
Justification: Vaan Island, situated 2 km off the Tuticorin coast in Tamil Nadu, is one of 21 uninhabited islands in the Gulf of Mannar. The primary aim is to curb erosion and facilitate coral rehabilitation in the surrounding areas. Due to rampant coral mining and rising sea levels, the island has suffered considerable damage over the years. This project marks India’s first effort to protect and restore a sinking island, funded by the National Adaptation Fund for Climate Change (NAFCC) under the Ministry of Environment, Forests and Climate Change (MoEFCC).
Learning: The Gulf of Mannar Biosphere Reserve, Asia’s first marine biosphere reserve, is located in the Southern Bay of Bengal. Covering an area of 10,500 sq. km, the reserve consists of 21 islands with continuous stretches of coral reef. The reserve is home to globally endangered species such as the dugong, various dolphin and whale species, and three endangered sea turtle species. It is also a part of UNESCO’s Man and Biosphere (MAB) program. - Question 4 of 5
4. Question
Which type of algae is most likely to thrive in deep ocean waters?
CorrectCorrect Answer : B
Justification: Light availability is a limiting factor for deep-sea life. Not all components of the visible light spectrum are accessible to marine plants at different ocean depths. As sunlight penetrates ocean water, it is dispersed into its seven constituent colors. Longer wavelengths cannot reach deeper depths, whereas shorter wavelengths can. Algae utilize photosynthesis to produce food. Red algae, which possess red pigment (phycoerythrin), carry out photosynthesis using only the short-wavelength light found at greater depths, allowing them to survive as deep as 200 m in the ocean.IncorrectCorrect Answer : B
Justification: Light availability is a limiting factor for deep-sea life. Not all components of the visible light spectrum are accessible to marine plants at different ocean depths. As sunlight penetrates ocean water, it is dispersed into its seven constituent colors. Longer wavelengths cannot reach deeper depths, whereas shorter wavelengths can. Algae utilize photosynthesis to produce food. Red algae, which possess red pigment (phycoerythrin), carry out photosynthesis using only the short-wavelength light found at greater depths, allowing them to survive as deep as 200 m in the ocean. - Question 5 of 5
5. Question
When patches of green are observed amidst large bodies of water, this indicates the presence of phytoplankton. A substantial green patch suggests that:
CorrectCorrect Answer: A
Justification & Learning: Phytoplankton, or microalgae, are akin to terrestrial plants in that they contain chlorophyll and require sunlight for growth. Most phytoplankton float in the upper ocean layers, where sunlight can penetrate. Phytoplankton also necessitate inorganic nutrients such as nitrates, phosphates, and sulfur, which they convert into proteins, fats, and carbohydrates. In a balanced ecosystem, they form the foundation of various aquatic food chains, providing sustenance for a broad range of sea creatures, including whales, shrimp, snails, and jellyfish.IncorrectCorrect Answer: A
Justification & Learning: Phytoplankton, or microalgae, are akin to terrestrial plants in that they contain chlorophyll and require sunlight for growth. Most phytoplankton float in the upper ocean layers, where sunlight can penetrate. Phytoplankton also necessitate inorganic nutrients such as nitrates, phosphates, and sulfur, which they convert into proteins, fats, and carbohydrates. In a balanced ecosystem, they form the foundation of various aquatic food chains, providing sustenance for a broad range of sea creatures, including whales, shrimp, snails, and jellyfish.
