{"id":5751,"date":"2025-12-27T13:41:43","date_gmt":"2025-12-27T13:41:43","guid":{"rendered":"https:\/\/mehnatt.com\/?p=5751"},"modified":"2025-12-27T13:41:43","modified_gmt":"2025-12-27T13:41:43","slug":"mcqs-based-on-environment-53","status":"publish","type":"post","link":"https:\/\/mehnatt.com\/?p=5751","title":{"rendered":"MCQs Based On Environment &#8211; (53)"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Q1. Which of the following is <strong>NOT<\/strong> a service provided by biodiversity?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Soil formation<\/li>\n\n\n\n<li style=\"font-size:17px\">Oxygen depletion<\/li>\n\n\n\n<li style=\"font-size:17px\">Nutrient cycling<\/li>\n\n\n\n<li style=\"font-size:17px\">Climate stability<\/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. Oxygen depletion <br\/>\n<strong>Explanation:<\/strong> Biodiversity contributes numerous ecosystem services that benefit humans and the planet. These include soil formation, nutrient cycling, pollution breakdown, climate regulation, and water purification. Biodiversity actually helps maintain and replenish oxygen through processes like photosynthesis by plants and algae. Oxygen depletion is typically caused by pollution (e.g., eutrophication) and is harmful, not a service. Hence, it is not a service provided by biodiversity.\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 of the following refers to <strong>in-situ conservation<\/strong>?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Zoological park<\/li>\n\n\n\n<li style=\"font-size:17px\">Seed bank<\/li>\n\n\n\n<li style=\"font-size:17px\">Biosphere reserve<\/li>\n\n\n\n<li style=\"font-size:17px\">Cryopreservation<\/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. Biosphere reserve <br\/>\n<strong>Explanation:<\/strong> In-situ conservation is the protection of species in their natural habitats, allowing them to continue living and evolving in their ecosystems. Examples include biosphere reserves, national parks, wildlife sanctuaries, and reserved forests. It helps preserve ecological processes, genetic diversity, and species interactions. Ex-situ methods like seed banks or zoos involve human intervention and remove species from their natural settings.\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. Which of the following is a <strong>natural cause<\/strong> of biodiversity loss?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Industrialization<\/li>\n\n\n\n<li>Deforestation<\/li>\n\n\n\n<li>Floods<\/li>\n\n\n\n<li>Poaching<\/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. Floods <br\/>\n<strong>Explanation:<\/strong> Floods are considered a natural cause of biodiversity loss. Natural factors such as earthquakes, volcanic eruptions, landslides, and climate changes can lead to habitat destruction and extinction of species. In contrast, industrialization, deforestation, and poaching are anthropogenic (human-made) causes of biodiversity loss. While natural causes are sometimes unavoidable, human activities have become the primary drivers of species extinction today.\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. What does the term <strong>\u2018alpha diversity\u2019<\/strong> refer to?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Diversity between ecosystems<\/li>\n\n\n\n<li style=\"font-size:17px\">Diversity within a single ecosystem<\/li>\n\n\n\n<li style=\"font-size:17px\">Global biodiversity<\/li>\n\n\n\n<li style=\"font-size:17px\">Species comparison over time<\/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. Diversity within a single ecosystem <br\/>\n<strong>Explanation:<\/strong> Alpha diversity refers to the number of species (species richness) within a particular area or ecosystem. It is used to assess the biodiversity of a specific community or habitat. For example, a forest with 40 species of trees would have higher alpha diversity than one with only 20. It differs from beta diversity (comparison between ecosystems) and gamma diversity (overall regional diversity).\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. According to IUCN, a species is called <strong>Critically Endangered (CR)<\/strong> when:<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">It has large populations in the wild<\/li>\n\n\n\n<li style=\"font-size:17px\">It has no chance of extinction<\/li>\n\n\n\n<li style=\"font-size:17px\">It is likely to become extinct in the next 100 years<\/li>\n\n\n\n<li style=\"font-size:17px\">It faces an extremely high risk of extinction in the wild<\/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. It faces an extremely high risk of extinction in the wild <br\/>\n<strong>Explanation:<\/strong> A species is listed as Critically Endangered (CR) by the IUCN when it meets very strict criteria indicating that it is facing an extremely high risk of extinction in the immediate future. This may be due to factors like:<br\/>\n\n&bull; A population decline of over 80\u201390% in 10 years,<br\/>\n\n&bull; Fewer than 50 mature individuals left,<br\/>\n\n&bull; A very restricted geographic range,<br\/>\n\n&bull; Or quantitative analysis showing at least 50% probability of extinction in the next 10 years.\nThese species need urgent conservation measures to survive.\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 is NOT a service provided by biodiversity? View Answer Correct Option: 2. Oxygen depletion Explanation: Biodiversity contributes numerous ecosystem services that benefit humans and the planet. These include soil formation, nutrient cycling, pollution breakdown, climate regulation, and water purification. Biodiversity actually helps maintain and replenish oxygen through processes like photosynthesis [&hellip;]<\/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":[1128,222,1123,21,1127,30,1124,31,1125,221,20],"class_list":["post-5751","post","type-post","status-publish","format-standard","hentry","category-environment","tag-alpha-diversity-2","tag-bank-exams","tag-biodiversity","tag-competitive-exams","tag-critically-endangered-cr","tag-environment","tag-in-situ-conservation","tag-mcq","tag-natural-cause","tag-rrb-exams","tag-ssc-cgl"],"_links":{"self":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5751","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=5751"}],"version-history":[{"count":7,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5751\/revisions"}],"predecessor-version":[{"id":5758,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5751\/revisions\/5758"}],"wp:attachment":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5751"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5751"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5751"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}