{"id":5169,"date":"2025-11-20T16:55:36","date_gmt":"2025-11-20T16:55:36","guid":{"rendered":"https:\/\/mehnatt.com\/?p=5169"},"modified":"2025-11-20T16:55:36","modified_gmt":"2025-11-20T16:55:36","slug":"mcqs-based-on-environment-10","status":"publish","type":"post","link":"https:\/\/mehnatt.com\/?p=5169","title":{"rendered":"MCQs Based On Environment &#8211; (10)"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Q1. Which of the following aquatic ecosystems has the highest salt concentration?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Freshwater<\/li>\n\n\n\n<li style=\"font-size:17px\">Marine<\/li>\n\n\n\n<li style=\"font-size:17px\">Brackish water<\/li>\n\n\n\n<li style=\"font-size:17px\">Estuarine<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 2. Marine <br\/>\n<strong>Explanation:<\/strong> Marine ecosystems have a salt concentration of 35 ppt or more, which is higher than freshwater (<5 ppt) and brackish water (5\u201335 ppt).\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q2. Which group of aquatic organisms are free-floating and have very limited locomotory power?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Nekton<\/li>\n\n\n\n<li style=\"font-size:17px\">Plankton<\/li>\n\n\n\n<li style=\"font-size:17px\">Benthos<\/li>\n\n\n\n<li style=\"font-size:17px\">Periphyton<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 2. Plankton <br\/>\n<strong>Explanation:<\/strong> Plankton includes microscopic floating organisms (algae and small animals) with limited ability to move, and their distribution largely depends on water currents.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q3. What is the term for organisms that live at the air-water interface, like floating plants and insects?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Benthos<\/li>\n\n\n\n<li style=\"font-size:17px\">Nekton<\/li>\n\n\n\n<li style=\"font-size:17px\">Neuston<\/li>\n\n\n\n<li style=\"font-size:17px\">Periphyton<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 3. Neuston <br\/>\n<strong>Explanation:<\/strong> Neuston refers to organisms living at the surface of the water (air-water interface), including floating plants and small insects like water striders.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q4. In which zone of an aquatic ecosystem does photosynthesis primarily occur?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Benthic zone<\/li>\n\n\n\n<li style=\"font-size:17px\">Aphotic zone<\/li>\n\n\n\n<li style=\"font-size:17px\">Profundal zone<\/li>\n\n\n\n<li style=\"font-size:17px\">Photic zone<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 4. Photic zone <br\/>\n<strong>Explanation:<\/strong> The photic zone is the lighted upper layer of water where sunlight penetrates, allowing photosynthesis by aquatic plants and phytoplankton.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q5. What is the phenomenon called when fish die during winter due to oxygen depletion under ice-covered lakes?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Summer kill<\/li>\n\n\n\n<li style=\"font-size:17px\">Algal bloom<\/li>\n\n\n\n<li style=\"font-size:17px\">Oxygen shock<\/li>\n\n\n\n<li style=\"font-size:17px\">Winter kill<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 4. Winter kill <br\/>\n<strong>Explanation:<\/strong> Winter kill occurs when snow and ice block sunlight, stopping photosynthesis. Meanwhile, respiration continues, depleting oxygen and killing fish.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n","protected":false},"excerpt":{"rendered":"<p>Q1. Which of the following aquatic ecosystems has the highest salt concentration? View Answer Correct Option: 2. Marine Explanation: Marine ecosystems have a salt concentration of 35 ppt or more, which is higher than freshwater (<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[19],"tags":[52,16,53,21,31,54,15,20,55],"class_list":["post-5169","post","type-post","status-publish","format-standard","hentry","category-environment","tag-aquatic-ecosystem","tag-bank","tag-benthic-zone","tag-competitive-exams","tag-mcq","tag-photic-zone","tag-rrb","tag-ssc-cgl","tag-winter-kill"],"_links":{"self":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5169","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5169"}],"version-history":[{"count":7,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5169\/revisions"}],"predecessor-version":[{"id":5176,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5169\/revisions\/5176"}],"wp:attachment":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5169"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5169"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}