{"id":84753,"date":"2025-06-01T02:49:01","date_gmt":"2025-06-01T02:49:01","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=84753"},"modified":"2025-06-01T02:49:01","modified_gmt":"2025-06-01T02:49:01","slug":"statement-i-bioaccumulation-is-a-process-of-progressive-accumulation","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/statement-i-bioaccumulation-is-a-process-of-progressive-accumulation\/","title":{"rendered":"Statement I :\nBioaccumulation is a process of progressive accumulation"},"content":{"rendered":"

Statement I :
\nBioaccumulation is a process of progressive accumulation of heavy metals and pesticides in an organism.
\nStatement II :
\nLarge fishes of the pond are found to have higher concentration of pesticides than planktons of the same pond.<\/p>\n

[amp_mcq option1=”Option text is missing in the image.” option2=”Option text is missing in the image.” option3=”Option text is missing in the image.” option4=”Option text is missing in the image.” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-1 – 2018<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nStatement I is true. Bioaccumulation is defined as the gradual accumulation of substances, such as pesticides, or other chemicals in an organism. This happens when the rate of intake of the substance exceeds the organism’s ability to remove it through metabolism or excretion. Statement II is also true. This phenomenon, where concentrations of substances like pesticides increase at successively higher levels in a food chain, is called biomagnification. Large fish are typically at higher trophic levels than plankton, and thus accumulate higher concentrations of persistent chemicals that are bioaccumulated by organisms at lower levels and passed up the chain. However, Statement II describes the *result* of bioaccumulation and biomagnification across a food chain, it does not explain the *process* of bioaccumulation (accumulation within a single organism) defined in Statement I. Therefore, Statement II is not the correct explanation for Statement I.
\n<\/section>\n
\nBioaccumulation is the accumulation within one organism. Biomagnification is the increase in concentration of a substance as it moves up the food chain.
\n<\/section>\n
\nPersistent organic pollutants (POPs) and heavy metals are common substances that undergo bioaccumulation and biomagnification, posing risks to organisms at higher trophic levels, including humans who consume contaminated fish or meat.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Statement I : Bioaccumulation is a process of progressive accumulation of heavy metals and pesticides in an organism. Statement II : Large fishes of the pond are found to have higher concentration of pesticides than planktons of the same pond. [amp_mcq option1=”Option text is missing in the image.” option2=”Option text is missing in the image.” … <\/p>\n

Detailed SolutionStatement I :
\nBioaccumulation is a process of progressive accumulation<\/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":[1087],"tags":[1114,1136,1137],"class_list":["post-84753","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1114","tag-environment-and-ecology","tag-pollution","no-featured-image-padding"],"yoast_head":"\nStatement I : Bioaccumulation is a process of progressive accumulation<\/title>\n<meta name=\"description\" content=\"Statement I is true. Bioaccumulation is defined as the gradual accumulation of substances, such as pesticides, or other chemicals in an organism. This happens when the rate of intake of the substance exceeds the organism's ability to remove it through metabolism or excretion. Statement II is also true. This phenomenon, where concentrations of substances like pesticides increase at successively higher levels in a food chain, is called biomagnification. Large fish are typically at higher trophic levels than plankton, and thus accumulate higher concentrations of persistent chemicals that are bioaccumulated by organisms at lower levels and passed up the chain. However, Statement II describes the *result* of bioaccumulation and biomagnification across a food chain, it does not explain the *process* of bioaccumulation (accumulation within a single organism) defined in Statement I. Therefore, Statement II is not the correct explanation for Statement I. Bioaccumulation is the accumulation within one organism. Biomagnification is the increase in concentration of a substance as it moves up the food chain.\" \/>\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\/statement-i-bioaccumulation-is-a-process-of-progressive-accumulation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Statement I : Bioaccumulation is a process of progressive accumulation\" \/>\n<meta property=\"og:description\" content=\"Statement I is true. Bioaccumulation is defined as the gradual accumulation of substances, such as pesticides, or other chemicals in an organism. This happens when the rate of intake of the substance exceeds the organism's ability to remove it through metabolism or excretion. Statement II is also true. This phenomenon, where concentrations of substances like pesticides increase at successively higher levels in a food chain, is called biomagnification. Large fish are typically at higher trophic levels than plankton, and thus accumulate higher concentrations of persistent chemicals that are bioaccumulated by organisms at lower levels and passed up the chain. However, Statement II describes the *result* of bioaccumulation and biomagnification across a food chain, it does not explain the *process* of bioaccumulation (accumulation within a single organism) defined in Statement I. Therefore, Statement II is not the correct explanation for Statement I. Bioaccumulation is the accumulation within one organism. Biomagnification is the increase in concentration of a substance as it moves up the food chain.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/statement-i-bioaccumulation-is-a-process-of-progressive-accumulation\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T02:49:01+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":"Statement I : Bioaccumulation is a process of progressive accumulation","description":"Statement I is true. Bioaccumulation is defined as the gradual accumulation of substances, such as pesticides, or other chemicals in an organism. This happens when the rate of intake of the substance exceeds the organism's ability to remove it through metabolism or excretion. Statement II is also true. This phenomenon, where concentrations of substances like pesticides increase at successively higher levels in a food chain, is called biomagnification. Large fish are typically at higher trophic levels than plankton, and thus accumulate higher concentrations of persistent chemicals that are bioaccumulated by organisms at lower levels and passed up the chain. However, Statement II describes the *result* of bioaccumulation and biomagnification across a food chain, it does not explain the *process* of bioaccumulation (accumulation within a single organism) defined in Statement I. Therefore, Statement II is not the correct explanation for Statement I. Bioaccumulation is the accumulation within one organism. Biomagnification is the increase in concentration of a substance as it moves up the food chain.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/statement-i-bioaccumulation-is-a-process-of-progressive-accumulation\/","og_locale":"en_US","og_type":"article","og_title":"Statement I : Bioaccumulation is a process of progressive accumulation","og_description":"Statement I is true. Bioaccumulation is defined as the gradual accumulation of substances, such as pesticides, or other chemicals in an organism. This happens when the rate of intake of the substance exceeds the organism's ability to remove it through metabolism or excretion. Statement II is also true. This phenomenon, where concentrations of substances like pesticides increase at successively higher levels in a food chain, is called biomagnification. Large fish are typically at higher trophic levels than plankton, and thus accumulate higher concentrations of persistent chemicals that are bioaccumulated by organisms at lower levels and passed up the chain. However, Statement II describes the *result* of bioaccumulation and biomagnification across a food chain, it does not explain the *process* of bioaccumulation (accumulation within a single organism) defined in Statement I. Therefore, Statement II is not the correct explanation for Statement I. Bioaccumulation is the accumulation within one organism. Biomagnification is the increase in concentration of a substance as it moves up the food chain.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/statement-i-bioaccumulation-is-a-process-of-progressive-accumulation\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T02:49:01+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/statement-i-bioaccumulation-is-a-process-of-progressive-accumulation\/","url":"https:\/\/exam.pscnotes.com\/mcq\/statement-i-bioaccumulation-is-a-process-of-progressive-accumulation\/","name":"Statement I : Bioaccumulation is a process of progressive accumulation","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T02:49:01+00:00","dateModified":"2025-06-01T02:49:01+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Statement I is true. Bioaccumulation is defined as the gradual accumulation of substances, such as pesticides, or other chemicals in an organism. This happens when the rate of intake of the substance exceeds the organism's ability to remove it through metabolism or excretion. Statement II is also true. This phenomenon, where concentrations of substances like pesticides increase at successively higher levels in a food chain, is called biomagnification. Large fish are typically at higher trophic levels than plankton, and thus accumulate higher concentrations of persistent chemicals that are bioaccumulated by organisms at lower levels and passed up the chain. However, Statement II describes the *result* of bioaccumulation and biomagnification across a food chain, it does not explain the *process* of bioaccumulation (accumulation within a single organism) defined in Statement I. Therefore, Statement II is not the correct explanation for Statement I. Bioaccumulation is the accumulation within one organism. Biomagnification is the increase in concentration of a substance as it moves up the food chain.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/statement-i-bioaccumulation-is-a-process-of-progressive-accumulation\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/statement-i-bioaccumulation-is-a-process-of-progressive-accumulation\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/statement-i-bioaccumulation-is-a-process-of-progressive-accumulation\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CDS-1","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-cds-1\/"},{"@type":"ListItem","position":3,"name":"Statement I : Bioaccumulation is a process of progressive accumulation"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/84753","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=84753"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/84753\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=84753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=84753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=84753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}