UPSC Exam > UPSC Questions > Consider the following statements regarding t...
Start Learning for Free
Consider the following statements regarding the Coral reefs:
1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.
2. Coral reefs are generally absent on the western coasts of continents.
3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.
2. Coral reefs are generally absent on the western coasts of continents.
3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.
Which of the above statements is/are correct?
- a)1 and 2
- b)2 and 3
- c)1 and 3
- d)1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Consider the following statements regarding the Coral reefs:1. Coral r...
The reef-building corals survive best under the following conditions:
1. The water temperature must not fall below 68°F. (20°C). This virtually limits the areal distribution of corals to the tropical, and sub-tropical zones. Again they will not flourish where there are cold currents because of the upwelling of the cold water from the depths that cools the warm surface water. This explains why coral reefs are generally absent on the western coasts of the warm currents, e.g. the Gulf Stream, means that corals are found far to the north of the West Indies in the Atlantic Ocean. The Pacific and the Indian Oceans, however, have the most numerous coral reefs.
2. The depth of the water should not exceed 30 fathoms or 180 feet, because beyond this depth sunlight is too faint for photosynthesis to take place. This is essential for the survival of the microscopic algae, on which the coral polyps depend. Shallow water of less than 100 feet is ideal. But there should always be plenty of water as polyps cannot survive for too long out of water.
3. The water should be saltish and free from sediment. Corals therefore survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams. The corals are best developed on the seaward side of the reef, where constantly moving waves, tides and currents maintain an abundant supply of clear, oxygenated water. They also bring an adequate supply of food in the form of microscopic organisms.
1. The water temperature must not fall below 68°F. (20°C). This virtually limits the areal distribution of corals to the tropical, and sub-tropical zones. Again they will not flourish where there are cold currents because of the upwelling of the cold water from the depths that cools the warm surface water. This explains why coral reefs are generally absent on the western coasts of the warm currents, e.g. the Gulf Stream, means that corals are found far to the north of the West Indies in the Atlantic Ocean. The Pacific and the Indian Oceans, however, have the most numerous coral reefs.
2. The depth of the water should not exceed 30 fathoms or 180 feet, because beyond this depth sunlight is too faint for photosynthesis to take place. This is essential for the survival of the microscopic algae, on which the coral polyps depend. Shallow water of less than 100 feet is ideal. But there should always be plenty of water as polyps cannot survive for too long out of water.
3. The water should be saltish and free from sediment. Corals therefore survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams. The corals are best developed on the seaward side of the reef, where constantly moving waves, tides and currents maintain an abundant supply of clear, oxygenated water. They also bring an adequate supply of food in the form of microscopic organisms.
|
Explore Courses for UPSC exam
|
|
Similar UPSC Doubts
Top Courses for UPSCView all
Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?
Question Description
Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?.
Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?.
Solutions for Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC.
Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free.
Here you can find the meaning of Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the following statements regarding the Coral reefs:1. Coral reefs are underwater structures made from calcium carbonate secreted by corals.2. Coral reefs are generally absent on the western coasts of continents.3. Corals survive best in the moving ocean water well away from the silty coasts or muddy mouths of streams.Which of the above statements is/are correct?a)1 and 2b)2 and 3c)1 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice UPSC tests.
|
|
Explore Courses for UPSC exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup