{"id":91158,"date":"2025-06-01T10:48:05","date_gmt":"2025-06-01T10:48:05","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=91158"},"modified":"2025-06-01T10:48:05","modified_gmt":"2025-06-01T10:48:05","slug":"which-of-the-following-adds-add-carbon-dioxide-to-the-carbon-cycle-on","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-adds-add-carbon-dioxide-to-the-carbon-cycle-on\/","title":{"rendered":"Which of the following adds\/add carbon dioxide to the carbon cycle on"},"content":{"rendered":"<p>Which of the following adds\/add carbon dioxide to the carbon cycle on the planet Earth?<\/p>\n<ul>\n<li>1. Volcanic action<\/li>\n<li>2. Respiration<\/li>\n<li>3. Photosynthesis<\/li>\n<li>4. Decay of organic matter<\/li>\n<\/ul>\n<p>Select the correct answer using the code given below.<\/p>\n<p>[amp_mcq option1=&#8221;1 and 3 only&#8221; option2=&#8221;2 only&#8221; option3=&#8221;1, 2 and 4 only&#8221; option4=&#8221;1, 2, 3 and 4&#8243; correct=&#8221;option3&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC IAS &#8211; 2014<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-ias-2014.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-ias-2014\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">Volcanic action, respiration, and decay of organic matter all release carbon dioxide into the atmosphere, thus adding to the carbon cycle.<\/section>\n<section id=\"pyq-key-points\">Volcanic eruptions release gases, including CO2, from the Earth&#8217;s interior. Respiration is the process by which living organisms convert organic matter into energy, releasing CO2 as a byproduct. Decomposers break down dead organic matter, releasing CO2 through respiration and decomposition processes. Photosynthesis, however, is the process by which plants and other organisms use sunlight, water, and CO2 to create energy-rich organic molecules, thus *removing* CO2 from the atmosphere.<\/section>\n<section id=\"pyq-additional-information\">The carbon cycle is a biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. Human activities, particularly the burning of fossil fuels and deforestation, have significantly increased the amount of CO2 in the atmosphere, leading to concerns about climate change.<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following adds\/add carbon dioxide to the carbon cycle on the planet Earth? 1. Volcanic action 2. Respiration 3. Photosynthesis 4. Decay of organic matter Select the correct answer using the code given below. [amp_mcq option1=&#8221;1 and 3 only&#8221; option2=&#8221;2 only&#8221; option3=&#8221;1, 2 and 4 only&#8221; option4=&#8221;1, 2, 3 and 4&#8243; correct=&#8221;option3&#8243;] This &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Which of the following adds\/add carbon dioxide to the carbon cycle on\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-adds-add-carbon-dioxide-to-the-carbon-cycle-on\/#more-91158\">Detailed Solution<span class=\"screen-reader-text\">Which of the following adds\/add carbon dioxide to the carbon cycle on<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1092],"tags":[1468,1367,1136],"class_list":["post-91158","post","type-post","status-publish","format-standard","hentry","category-upsc-ias","tag-1468","tag-ecology","tag-environment-and-ecology","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Which of the following adds\/add carbon dioxide to the carbon cycle on<\/title>\n<meta name=\"description\" content=\"Volcanic action, respiration, and decay of organic matter all release carbon dioxide into the atmosphere, thus adding to the carbon cycle. Volcanic eruptions release gases, including CO2, from the Earth&#039;s interior. Respiration is the process by which living organisms convert organic matter into energy, releasing CO2 as a byproduct. Decomposers break down dead organic matter, releasing CO2 through respiration and decomposition processes. Photosynthesis, however, is the process by which plants and other organisms use sunlight, water, and CO2 to create energy-rich organic molecules, thus *removing* CO2 from the atmosphere.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-adds-add-carbon-dioxide-to-the-carbon-cycle-on\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which of the following adds\/add carbon dioxide to the carbon cycle on\" \/>\n<meta property=\"og:description\" content=\"Volcanic action, respiration, and decay of organic matter all release carbon dioxide into the atmosphere, thus adding to the carbon cycle. Volcanic eruptions release gases, including CO2, from the Earth&#039;s interior. Respiration is the process by which living organisms convert organic matter into energy, releasing CO2 as a byproduct. Decomposers break down dead organic matter, releasing CO2 through respiration and decomposition processes. Photosynthesis, however, is the process by which plants and other organisms use sunlight, water, and CO2 to create energy-rich organic molecules, thus *removing* CO2 from the atmosphere.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-adds-add-carbon-dioxide-to-the-carbon-cycle-on\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:48:05+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which of the following adds\/add carbon dioxide to the carbon cycle on","description":"Volcanic action, respiration, and decay of organic matter all release carbon dioxide into the atmosphere, thus adding to the carbon cycle. Volcanic eruptions release gases, including CO2, from the Earth's interior. Respiration is the process by which living organisms convert organic matter into energy, releasing CO2 as a byproduct. Decomposers break down dead organic matter, releasing CO2 through respiration and decomposition processes. 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Volcanic eruptions release gases, including CO2, from the Earth's interior. Respiration is the process by which living organisms convert organic matter into energy, releasing CO2 as a byproduct. Decomposers break down dead organic matter, releasing CO2 through respiration and decomposition processes. 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