{"id":5810,"date":"2025-12-30T18:18:34","date_gmt":"2025-12-30T18:18:34","guid":{"rendered":"https:\/\/mehnatt.com\/?p=5810"},"modified":"2025-12-30T18:18:34","modified_gmt":"2025-12-30T18:18:34","slug":"mcqs-based-on-environment-64","status":"publish","type":"post","link":"https:\/\/mehnatt.com\/?p=5810","title":{"rendered":"MCQs Based On Environment &#8211; (64)"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Q1. Which of the following roots grow downward from branches and anchor upon reaching the ground?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Stilt roots<\/li>\n\n\n\n<li style=\"font-size:17px\">Prop roots<\/li>\n\n\n\n<li style=\"font-size:17px\">Lateral roots<\/li>\n\n\n\n<li style=\"font-size:17px\">Pneumatophores<\/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. Prop roots <br\/>\n<strong>Explanation:<\/strong> Prop roots are aerial adventitious roots growing from branches or the trunk, which:<br\/>\n\n&bull; Grow downward, then anchor into the soil.<br\/>\n\n&bull; Provide mechanical support to heavy or wide-spreading branches.<br\/>\n\n&bull; Are typical of the Banyan tree (Ficus benghalensis).<br\/>\n\nThey differ from stilt roots, which arise from the lower stem, and pneumatophores, which function in gas exchange in swamps.\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. What scientific method uses annual rings to determine the age of a tree?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Phenology<\/li>\n\n\n\n<li style=\"font-size:17px\">Arboriculture<\/li>\n\n\n\n<li style=\"font-size:17px\">Dendrochronology<\/li>\n\n\n\n<li style=\"font-size:17px\">Paleobotany<\/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. Dendrochronology <br\/>\n<strong>Explanation:<\/strong> Dendrochronology is the science of determining the age of a tree by counting its annual rings.<br\/>\n\n&bull; Each year, a tree forms a new growth ring.<br\/>\n\n&bull; These rings can also give insight into past climatic conditions, known as paleoclimatology.<br\/>\n\n&bull; Wider rings indicate favorable growing seasons; narrower rings indicate stress (drought, cold, etc.).<br\/>\n\nIt\u2019s a crucial tool in ecology, archaeology, and climate science.\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. Parthenium (Congress grass) is mainly considered a problematic weed in which of the following areas?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Desert ecosystems<\/li>\n\n\n\n<li style=\"font-size:17px\">Cultivated fields and wastelands<\/li>\n\n\n\n<li style=\"font-size:17px\">Alpine forests<\/li>\n\n\n\n<li style=\"font-size:17px\">Mangroves<\/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. Cultivated fields and wastelands <br\/>\n<strong>Explanation:<\/strong> Parthenium hysterophorus, or Congress grass, is an invasive weed native to North America and widely spread throughout India.<br\/>\n\n&bull; Found in fields, roadsides, forest edges, and wastelands.<br\/>\n\n&bull; It reduces crop productivity and is harmful to humans and livestock.<br\/>\n\n&bull; Causes skin allergies, asthma, and displaces native vegetation.<br\/>\n\nIts control is difficult due to its prolific seed production and fast growth.\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. Which of the following trees is a partial root parasite?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Teak<\/li>\n\n\n\n<li style=\"font-size:17px\">Sal<\/li>\n\n\n\n<li style=\"font-size:17px\">Sandalwood<\/li>\n\n\n\n<li style=\"font-size:17px\">Neem<\/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. Sandalwood <br\/>\n<strong>Explanation:<\/strong>Sandalwood (Santalum album) is a partial root parasite:<br\/>\n\n&bull; Begins as an independent seedling, then connects its roots to nearby plants to extract water and minerals via haustoria.<br\/>\n\n&bull; It still performs photosynthesis to make its own food.<br\/>\n\n&bull; Cannot grow effectively without a host plant, especially during early growth.<br\/>\n\nThis unique adaptation makes it valuable but also challenging to cultivate.\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. Which of the following best describes the role of leaves in a tree?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Store nutrients for later use<\/li>\n\n\n\n<li style=\"font-size:17px\">Convert solar energy into food via photosynthesis<\/li>\n\n\n\n<li style=\"font-size:17px\">Anchor the tree into the soil<\/li>\n\n\n\n<li style=\"font-size:17px\">Serve only as shade structures<\/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. Convert solar energy into food via photosynthesis <br\/>\n<strong>Explanation:<\/strong>Leaves are the photosynthetic organs of a tree.<br\/>\n\n&bull; Contain chlorophyll, which captures sunlight energy.<br\/>\n&bull; Use this energy to convert CO\u2082 + water into glucose (food) and oxygen.<br\/>\n\n&bull; The food supports tree growth, and the oxygen is released into the atmosphere.<br\/>\n\nThus, leaves play a crucial ecological role and are often referred to as the lungs and kitchens of the planet.\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 roots grow downward from branches and anchor upon reaching the ground? View Answer Correct Option: 2. Prop roots Explanation: Prop roots are aerial adventitious roots growing from branches or the trunk, which: &bull; Grow downward, then anchor into the soil. &bull; Provide mechanical support to heavy or wide-spreading branches. &bull; [&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":[222,21,1248,30,31,1247,1249,221,20],"class_list":["post-5810","post","type-post","status-publish","format-standard","hentry","category-environment","tag-bank-exams","tag-competitive-exams","tag-congress-grass","tag-environment","tag-mcq","tag-parthenium","tag-partial-root-parasite","tag-rrb-exams","tag-ssc-cgl"],"_links":{"self":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5810","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=5810"}],"version-history":[{"count":5,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5810\/revisions"}],"predecessor-version":[{"id":5815,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5810\/revisions\/5815"}],"wp:attachment":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}