{"id":5768,"date":"2025-12-27T14:08:30","date_gmt":"2025-12-27T14:08:30","guid":{"rendered":"https:\/\/mehnatt.com\/?p=5768"},"modified":"2025-12-27T14:08:30","modified_gmt":"2025-12-27T14:08:30","slug":"mcqs-based-on-environment-56","status":"publish","type":"post","link":"https:\/\/mehnatt.com\/?p=5768","title":{"rendered":"MCQs Based On Environment &#8211; (56)"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Q1. Which of the following statements correctly describes the symbiotic relationship in lichens?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">The fungus provides food while the alga retains water<\/li>\n\n\n\n<li style=\"font-size:17px\">Both alga and fungus compete for nutrients<\/li>\n\n\n\n<li style=\"font-size:17px\">The alga provides food and the fungus retains moisture<\/li>\n\n\n\n<li style=\"font-size:17px\">Both alga and fungus live independently<\/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. The alga provides food and the fungus retains moisture <br\/>\n<strong>Explanation:<\/strong> Lichens are a classic example of symbiosis \u2014 a mutually beneficial relationship between two different organisms. In this case:<br\/>\n\n&bull; The alga (or cyanobacterium) carries out photosynthesis, producing carbohydrates (food).<br\/>\n\n&bull; The fungus, which lacks chlorophyll, cannot make its own food but is excellent at absorbing and retaining moisture and nutrients from the environment.<br\/>\n\n&bull; The fungus provides a protective structure and a moist environment that allows the alga to survive in harsh conditions (like on rocks or tree trunks).<br\/>\n\n&bull; This cooperation allows lichens to survive in nutrient-poor and extreme habitats where neither organism could live alone.\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 plant groups lacks true roots but typically grows in moist environments?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Gymnosperms<\/li>\n\n\n\n<li style=\"font-size:17px\">Bryophytes<\/li>\n\n\n\n<li style=\"font-size:17px\">Angiosperms<\/li>\n\n\n\n<li style=\"font-size:17px\">Pteridophytes<\/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. Bryophytes <br\/>\n<strong>Explanation:<\/strong> Bryophytes are non-vascular plants, meaning they lack the vascular tissues (xylem and phloem) found in more advanced plants.<br\/>\n\n&bull; They do not have true roots, stems, or leaves. Instead, they have rhizoids \u2014 hair-like structures that help in anchorage but not in water absorption.<br\/>\n\n&bull; Bryophytes include mosses, liverworts, and hornworts.<br\/>\n\n&bull; They thrive in moist and shady environments because their reproduction (via spores) requires water for fertilization \u2014 the male gametes need water to swim to the female gametes.<br\/>\n\n&bull; Since they lack vascular tissues, they cannot transport water efficiently over long distances and must absorb it directly from the environment.\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. In Gymnosperms, the seeds are described as \u201cnaked\u201d because:<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">The ovules are enclosed within fruits<\/li>\n\n\n\n<li style=\"font-size:17px\">The seeds are exposed without any covering<\/li>\n\n\n\n<li style=\"font-size:17px\">The seeds are produced without fertilization<\/li>\n\n\n\n<li style=\"font-size:17px\">The flowers are bright and conspicuous<\/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. The seeds are exposed without any covering <br\/>\n<strong>Explanation:<\/strong> The word &#8220;Gymnosperm&#8221; is derived from Greek:<br\/>\n\n&bull; Gymnos = naked<br\/>\n\n&bull; Sperma = seed<br\/>\nThis means &#8220;naked seed&#8221;, and here&#8217;s why:<br\/>\n\n&bull; In gymnosperms, the ovules are not enclosed within an ovary.<br\/>\n\n&bull; The seeds develop openly on the surface of cone scales (carpels), instead of being enclosed within a fruit like in angiosperms.<br\/>\n\n&bull; Examples include Pine (Pinus), Cycas, and Gnetum.<br\/>\n\n&bull; Since there is no ovary, gymnosperms do not form true fruits \u2014 the seeds are directly exposed to the environment, making them vulnerable but evolutionarily significant.\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 region of India is most diverse in pteridophytes like ferns and horsetails?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Eastern Himalayas and Northeast India<\/li>\n\n\n\n<li style=\"font-size:17px\">Western Rajasthan<\/li>\n\n\n\n<li style=\"font-size:17px\">Deccan Plateau<\/li>\n\n\n\n<li style=\"font-size:17px\">Andaman &amp; Nicobar Islands<\/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> 1. Eastern Himalayas and Northeast India <br\/>\n<strong>Explanation:<\/strong> Pteridophytes are the first vascular plants in evolution, having true roots, stems, and leaves, and vascular tissues (xylem and phloem).<br\/>\n\n&bull; They reproduce via spores, not seeds.<br\/>\n\n&bull; Moisture is essential for their reproduction, as sperm must swim to the egg.<br\/>\n\n&bull; Therefore, they thrive in moist, shady environments like rainforests, mountain slopes, and stream banks.<br\/>\n\n&bull; In India, the Eastern Himalayas and Northeast India offer the ideal climate: high rainfall, dense canopy cover, and high humidity, making them rich in pteridophytic diversity.<br\/>\n\n&bull; Common pteridophytes in these areas include ferns, horsetails (Equisetum), and club mosses (Lycopodium).\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. The Sunderbans mangrove ecosystem is characterized by which of the following tree species in the lower tidal zones?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Rhizophora<\/li>\n\n\n\n<li style=\"font-size:17px\">Bruguiera<\/li>\n\n\n\n<li style=\"font-size:17px\">Sonneratia and Avicennia<\/li>\n\n\n\n<li style=\"font-size:17px\">Phoenix and Nypa palm<\/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. Sonneratia and Avicennia <br\/>\n<strong>Explanation:<\/strong> The Sunderbans, located in the delta region of the Ganges and Brahmaputra rivers, is the largest mangrove forest in the world and a UNESCO World Heritage site.<br\/><br\/>\n\n&bull; The mangrove ecosystem is zoned according to tidal influence.<br\/>\n\n&bull; In the lowest tidal zones, which are frequently flooded by seawater, species like:<br\/>\n\n(1) Sonneratia<br\/>\n\n(2) Avicennia<br\/>\nare the pioneer species \u2014 they tolerate high salinity and waterlogging.<br\/><br\/>\n\n&bull; These trees have special adaptations, such as:<br\/>\n\n(1) Pneumatophores (aerial roots) for oxygen intake in waterlogged soil.<br\/>\n\n(2) Salt glands or ultrafiltration mechanisms to deal with salinity.<br\/><br\/>\n\n&bull; Higher up in the tidal zone, you find species like Rhizophora, Bruguiera, and Excoecaria, followed by palms like Phoenix and Nypa at the uppermost levels.\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 statements correctly describes the symbiotic relationship in lichens? View Answer Correct Option: 3. The alga provides food and the fungus retains moisture Explanation: Lichens are a classic example of symbiosis \u2014 a mutually beneficial relationship between two different organisms. In this case: &bull; The alga (or cyanobacterium) carries out 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":[222,21,30,1149,1145,1148,1151,31,1144,1146,1147,221,20,1150,1143],"class_list":["post-5768","post","type-post","status-publish","format-standard","hentry","category-environment","tag-bank-exams","tag-competitive-exams","tag-environment","tag-ferns","tag-gymnosperms","tag-horsetails","tag-lower-tidal-zones","tag-mcq","tag-moist-environments","tag-naked","tag-pteridophytes","tag-rrb-exams","tag-ssc-cgl","tag-sunderbans-mangrove-ecosystem","tag-symbiotic-relationship-in-lichens"],"_links":{"self":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5768","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=5768"}],"version-history":[{"count":5,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5768\/revisions"}],"predecessor-version":[{"id":5773,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5768\/revisions\/5773"}],"wp:attachment":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}