{"id":91612,"date":"2025-06-01T11:01:07","date_gmt":"2025-06-01T11:01:07","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=91612"},"modified":"2025-06-01T11:01:07","modified_gmt":"2025-06-01T11:01:07","slug":"consider-the-following-statements-1-most-of-the-worlds-coral-re","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/","title":{"rendered":"Consider the following statements :\n \n 1. Most of the world&#8217;s coral re"},"content":{"rendered":"<p>Consider the following statements :<\/p>\n<ul>\n<li>1. Most of the world&#8217;s coral reefs are in tropical waters.<\/li>\n<li>2. More than one-third of the world&#8217;s coral reefs are located in the territories of Australia, Indonesia and Philippines.<\/li>\n<li>3. Coral reefs host far more number of animal phyla than those hosted by tropical rainforests.<\/li>\n<\/ul>\n<p>Which of the statements given above is\/are correct ?<\/p>\n<p>[amp_mcq option1=&#8221;1 and 2 only&#8221; option2=&#8221;3 only&#8221; option3=&#8221;1 and 3 only&#8221; option4=&#8221;1, 2 and 3&#8243; correct=&#8221;option4&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC IAS &#8211; 2018<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-ias-2018.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-ias-2018\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nThe correct answer is D) 1, 2 and 3.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nLet&#8217;s evaluate each statement regarding coral reefs:<br \/>\n1.  **Most of the world&#8217;s coral reefs are in tropical waters:** This statement is correct. Corals require specific environmental conditions for growth, including warm water temperatures (typically between 20-30\u00b0C), shallow depths allowing sunlight penetration (for symbiotic algae), clear water, and normal marine salinity. These conditions are predominantly found in tropical and sub-tropical regions.<br \/>\n2.  **More than one-third of the world&#8217;s coral reefs are located in the territories of Australia, Indonesia and Philippines:** This statement is correct. These three countries are part of the &#8220;Coral Triangle,&#8221; a marine region considered the global center of marine biodiversity. Australia hosts the Great Barrier Reef, the world&#8217;s largest coral reef system. Indonesia and the Philippines have extensive reef systems within the Coral Triangle, which collectively hold the highest diversity of corals and reef fish globally. Together, these three nations account for a very significant proportion of the world&#8217;s coral reefs.<br \/>\n3.  **Coral reefs host far more number of animal phyla than those hosted by tropical rainforests:** This statement is correct. While tropical rainforests are incredibly rich in species (especially insects and plants), marine ecosystems, in general, host a greater diversity of animal *phyla* compared to terrestrial ecosystems. Coral reefs, being highly complex and productive marine environments, are known to support a vast array of marine life representing a wide range of animal phyla, including sponges, cnidarians (corals, jellyfish), mollusks, arthropods, annelids, echinoderms, chordates (fish, turtles, etc.), and many others. The number of phyla found in marine environments is substantially higher than on land, and coral reefs are hotspots for this phylogenetic diversity.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nCoral reefs are critically important ecosystems, providing habitat for a quarter of all marine species, protecting coastlines from erosion and storms, and supporting livelihoods through fisheries and tourism. They are, however, highly vulnerable to threats like climate change (ocean warming and acidification), pollution, overfishing, and habitat destruction.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Consider the following statements : 1. Most of the world&#8217;s coral reefs are in tropical waters. 2. More than one-third of the world&#8217;s coral reefs are located in the territories of Australia, Indonesia and Philippines. 3. Coral reefs host far more number of animal phyla than those hosted by tropical rainforests. Which of the statements &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Consider the following statements :\n \n 1. Most of the world&#8217;s coral re\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/#more-91612\">Detailed Solution<span class=\"screen-reader-text\">Consider the following statements :<\/p>\n<p> 1. Most of the world&#8217;s coral re<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1092],"tags":[1114,1224,1136],"class_list":["post-91612","post","type-post","status-publish","format-standard","hentry","category-upsc-ias","tag-1114","tag-biodiversity","tag-environment-and-ecology","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Consider the following statements :  1. Most of the world&#039;s coral re<\/title>\n<meta name=\"description\" content=\"The correct answer is D) 1, 2 and 3. Let&#039;s evaluate each statement regarding coral reefs: 1. **Most of the world&#039;s coral reefs are in tropical waters:** This statement is correct. Corals require specific environmental conditions for growth, including warm water temperatures (typically between 20-30\u00b0C), shallow depths allowing sunlight penetration (for symbiotic algae), clear water, and normal marine salinity. These conditions are predominantly found in tropical and sub-tropical regions. 2. **More than one-third of the world&#039;s coral reefs are located in the territories of Australia, Indonesia and Philippines:** This statement is correct. These three countries are part of the &quot;Coral Triangle,&quot; a marine region considered the global center of marine biodiversity. Australia hosts the Great Barrier Reef, the world&#039;s largest coral reef system. Indonesia and the Philippines have extensive reef systems within the Coral Triangle, which collectively hold the highest diversity of corals and reef fish globally. Together, these three nations account for a very significant proportion of the world&#039;s coral reefs. 3. **Coral reefs host far more number of animal phyla than those hosted by tropical rainforests:** This statement is correct. While tropical rainforests are incredibly rich in species (especially insects and plants), marine ecosystems, in general, host a greater diversity of animal *phyla* compared to terrestrial ecosystems. Coral reefs, being highly complex and productive marine environments, are known to support a vast array of marine life representing a wide range of animal phyla, including sponges, cnidarians (corals, jellyfish), mollusks, arthropods, annelids, echinoderms, chordates (fish, turtles, etc.), and many others. The number of phyla found in marine environments is substantially higher than on land, and coral reefs are hotspots for this phylogenetic diversity.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Consider the following statements :  1. Most of the world&#039;s coral re\" \/>\n<meta property=\"og:description\" content=\"The correct answer is D) 1, 2 and 3. Let&#039;s evaluate each statement regarding coral reefs: 1. **Most of the world&#039;s coral reefs are in tropical waters:** This statement is correct. Corals require specific environmental conditions for growth, including warm water temperatures (typically between 20-30\u00b0C), shallow depths allowing sunlight penetration (for symbiotic algae), clear water, and normal marine salinity. These conditions are predominantly found in tropical and sub-tropical regions. 2. **More than one-third of the world&#039;s coral reefs are located in the territories of Australia, Indonesia and Philippines:** This statement is correct. These three countries are part of the &quot;Coral Triangle,&quot; a marine region considered the global center of marine biodiversity. Australia hosts the Great Barrier Reef, the world&#039;s largest coral reef system. Indonesia and the Philippines have extensive reef systems within the Coral Triangle, which collectively hold the highest diversity of corals and reef fish globally. Together, these three nations account for a very significant proportion of the world&#039;s coral reefs. 3. **Coral reefs host far more number of animal phyla than those hosted by tropical rainforests:** This statement is correct. While tropical rainforests are incredibly rich in species (especially insects and plants), marine ecosystems, in general, host a greater diversity of animal *phyla* compared to terrestrial ecosystems. Coral reefs, being highly complex and productive marine environments, are known to support a vast array of marine life representing a wide range of animal phyla, including sponges, cnidarians (corals, jellyfish), mollusks, arthropods, annelids, echinoderms, chordates (fish, turtles, etc.), and many others. The number of phyla found in marine environments is substantially higher than on land, and coral reefs are hotspots for this phylogenetic diversity.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T11:01:07+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Consider the following statements :  1. Most of the world's coral re","description":"The correct answer is D) 1, 2 and 3. Let's evaluate each statement regarding coral reefs: 1. **Most of the world's coral reefs are in tropical waters:** This statement is correct. Corals require specific environmental conditions for growth, including warm water temperatures (typically between 20-30\u00b0C), shallow depths allowing sunlight penetration (for symbiotic algae), clear water, and normal marine salinity. These conditions are predominantly found in tropical and sub-tropical regions. 2. **More than one-third of the world's coral reefs are located in the territories of Australia, Indonesia and Philippines:** This statement is correct. These three countries are part of the \"Coral Triangle,\" a marine region considered the global center of marine biodiversity. Australia hosts the Great Barrier Reef, the world's largest coral reef system. Indonesia and the Philippines have extensive reef systems within the Coral Triangle, which collectively hold the highest diversity of corals and reef fish globally. Together, these three nations account for a very significant proportion of the world's coral reefs. 3. **Coral reefs host far more number of animal phyla than those hosted by tropical rainforests:** This statement is correct. While tropical rainforests are incredibly rich in species (especially insects and plants), marine ecosystems, in general, host a greater diversity of animal *phyla* compared to terrestrial ecosystems. Coral reefs, being highly complex and productive marine environments, are known to support a vast array of marine life representing a wide range of animal phyla, including sponges, cnidarians (corals, jellyfish), mollusks, arthropods, annelids, echinoderms, chordates (fish, turtles, etc.), and many others. The number of phyla found in marine environments is substantially higher than on land, and coral reefs are hotspots for this phylogenetic diversity.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/","og_locale":"en_US","og_type":"article","og_title":"Consider the following statements :  1. Most of the world's coral re","og_description":"The correct answer is D) 1, 2 and 3. Let's evaluate each statement regarding coral reefs: 1. **Most of the world's coral reefs are in tropical waters:** This statement is correct. Corals require specific environmental conditions for growth, including warm water temperatures (typically between 20-30\u00b0C), shallow depths allowing sunlight penetration (for symbiotic algae), clear water, and normal marine salinity. These conditions are predominantly found in tropical and sub-tropical regions. 2. **More than one-third of the world's coral reefs are located in the territories of Australia, Indonesia and Philippines:** This statement is correct. These three countries are part of the \"Coral Triangle,\" a marine region considered the global center of marine biodiversity. Australia hosts the Great Barrier Reef, the world's largest coral reef system. Indonesia and the Philippines have extensive reef systems within the Coral Triangle, which collectively hold the highest diversity of corals and reef fish globally. Together, these three nations account for a very significant proportion of the world's coral reefs. 3. **Coral reefs host far more number of animal phyla than those hosted by tropical rainforests:** This statement is correct. While tropical rainforests are incredibly rich in species (especially insects and plants), marine ecosystems, in general, host a greater diversity of animal *phyla* compared to terrestrial ecosystems. Coral reefs, being highly complex and productive marine environments, are known to support a vast array of marine life representing a wide range of animal phyla, including sponges, cnidarians (corals, jellyfish), mollusks, arthropods, annelids, echinoderms, chordates (fish, turtles, etc.), and many others. The number of phyla found in marine environments is substantially higher than on land, and coral reefs are hotspots for this phylogenetic diversity.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T11:01:07+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/","url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/","name":"Consider the following statements : 1. Most of the world's coral re","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T11:01:07+00:00","dateModified":"2025-06-01T11:01:07+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is D) 1, 2 and 3. Let's evaluate each statement regarding coral reefs: 1. **Most of the world's coral reefs are in tropical waters:** This statement is correct. Corals require specific environmental conditions for growth, including warm water temperatures (typically between 20-30\u00b0C), shallow depths allowing sunlight penetration (for symbiotic algae), clear water, and normal marine salinity. These conditions are predominantly found in tropical and sub-tropical regions. 2. **More than one-third of the world's coral reefs are located in the territories of Australia, Indonesia and Philippines:** This statement is correct. These three countries are part of the \"Coral Triangle,\" a marine region considered the global center of marine biodiversity. Australia hosts the Great Barrier Reef, the world's largest coral reef system. Indonesia and the Philippines have extensive reef systems within the Coral Triangle, which collectively hold the highest diversity of corals and reef fish globally. Together, these three nations account for a very significant proportion of the world's coral reefs. 3. **Coral reefs host far more number of animal phyla than those hosted by tropical rainforests:** This statement is correct. While tropical rainforests are incredibly rich in species (especially insects and plants), marine ecosystems, in general, host a greater diversity of animal *phyla* compared to terrestrial ecosystems. Coral reefs, being highly complex and productive marine environments, are known to support a vast array of marine life representing a wide range of animal phyla, including sponges, cnidarians (corals, jellyfish), mollusks, arthropods, annelids, echinoderms, chordates (fish, turtles, etc.), and many others. The number of phyla found in marine environments is substantially higher than on land, and coral reefs are hotspots for this phylogenetic diversity.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-most-of-the-worlds-coral-re\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC IAS","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-ias\/"},{"@type":"ListItem","position":3,"name":"Consider the following statements : 1. Most of the world&#8217;s coral re"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/91612","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=91612"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/91612\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=91612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=91612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=91612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}