{"id":233847,"date":"2025-06-13T13:06:40","date_gmt":"2025-06-13T13:06:40","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=233847"},"modified":"2025-06-13T13:06:43","modified_gmt":"2025-06-13T13:06:43","slug":"an-organism-is-multicellular-eukaryotic-heterotroph-with-cell-walls-containing-chitin","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/13\/an-organism-is-multicellular-eukaryotic-heterotroph-with-cell-walls-containing-chitin\/","title":{"rendered":"An organism is multicellular, eukaryotic, heterotroph with cell walls containing chitin."},"content":{"rendered":"\n<p>An organism is multicellular, eukaryotic, heterotroph with cell walls containing chitin. It is most likely a(n): A. plant B. animal C. eubacterium D. archaea E. fungus QUESTION 20 Which of the following are essential parts of a &#8220;seed&#8221;? A. a plant sporophyte embryo B. stored food C. protective coating D. All of the above E. B and C only QUESTION 21 Which of the following is NOT an ecological role of fungi? A. supporting plant life via mycorrhizal symbioses B. recycling materials as decomposers C. pioneering bare rock and other sparse environments via mutualistic relationships as lichens D. independent (non-symbiotic) production of organic material as photosynthetic autotrophs E. infecting other organisms as parasitic symbionts<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p><strong>QUESTION 19<\/strong><br><strong>Correct Answer: E. Fungus<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><br>The organism described is <strong>multicellular<\/strong>, <strong>eukaryotic<\/strong>, <strong>heterotrophic<\/strong>, and has <strong>cell walls containing chitin<\/strong>. These are defining characteristics of <strong>fungi<\/strong>. Fungi differ from plants in that they do not carry out photosynthesis; instead, they obtain nutrients by absorbing them from their environment. They digest food externally by releasing enzymes into the surroundings and then absorbing the resulting nutrients. Unlike plants whose cell walls contain cellulose, fungal cell walls are made of <strong>chitin<\/strong>, a strong, flexible polysaccharide. Additionally, fungi are eukaryotic, meaning they have a defined nucleus and membrane-bound organelles. This distinguishes them from prokaryotic organisms such as eubacteria and archaea. Animals, although also multicellular and heterotrophic, do not have cell walls, which eliminates them from this classification.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>QUESTION 20<\/strong><br><strong>Correct Answer: D. All of the above<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><br>A <strong>seed<\/strong> is a reproductive structure in seed plants that ensures the development and survival of the plant embryo. It has three <strong>essential parts<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Embryo<\/strong> \u2013 the developing plant (a young sporophyte), which will grow into the new plant.<\/li>\n\n\n\n<li><strong>Stored Food<\/strong> \u2013 provides nourishment to the embryo during germination before it can perform photosynthesis.<\/li>\n\n\n\n<li><strong>Protective Coating<\/strong> \u2013 typically called the seed coat, this layer protects the seed from physical damage, desiccation, and pathogens.<br>These three parts work together to ensure that the plant can survive unfavorable environmental conditions and resume growth when conditions improve. Therefore, the correct answer includes all these components.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>QUESTION 21<\/strong><br><strong>Correct Answer: D. Independent (non-symbiotic) production of organic material as photosynthetic autotrophs<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><br><strong>Fungi<\/strong> are <strong>heterotrophic<\/strong> organisms, meaning they cannot produce their own food like autotrophs (such as plants and some bacteria). They do not carry out <strong>photosynthesis<\/strong> and thus cannot fix carbon independently. Instead, fungi absorb nutrients from organic material\u2014living or dead\u2014making them excellent <strong>decomposers<\/strong> in ecosystems. Fungi also form <strong>symbiotic relationships<\/strong>, such as <strong>mycorrhizae<\/strong> (with plant roots) and <strong>lichens<\/strong> (with algae or cyanobacteria), which help in nutrient cycling and colonization of harsh environments. Some fungi are <strong>parasitic<\/strong>, feeding on living organisms and sometimes causing disease. However, they are never photosynthetic or independently autotrophic, which makes choice D incorrect regarding their ecological roles.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-345.jpeg\" alt=\"\" class=\"wp-image-233848\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>An organism is multicellular, eukaryotic, heterotroph with cell walls containing chitin. It is most likely a(n): A. plant B. animal C. eubacterium D. archaea E. fungus QUESTION 20 Which of the following are essential parts of a &#8220;seed&#8221;? A. a plant sporophyte embryo B. stored food C. protective coating D. All of the above E. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","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":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"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":""},"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":[25],"tags":[],"class_list":["post-233847","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233847","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=233847"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233847\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=233847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=233847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=233847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}