{"id":86723,"date":"2025-06-01T04:19:27","date_gmt":"2025-06-01T04:19:27","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86723"},"modified":"2025-06-01T04:19:27","modified_gmt":"2025-06-01T04:19:27","slug":"which-one-of-the-following-is-correct-with-regards-to-animals-with-bil","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-correct-with-regards-to-animals-with-bil\/","title":{"rendered":"Which one of the following is correct with regards to animals with bil"},"content":{"rendered":"

Which one of the following is correct with regards to animals with bilateral symmetry, triploblastic body and true body cavity?<\/p>\n

[amp_mcq option1=”Roundworm, earthworm and leech” option2=”Earthworm, leech and nereis” option3=”Ascaris, round worm and earthworm” option4=”Earthworm, sea cucumber and sea urchin” correct=”option2″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC Geoscientist – 2020<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nOption B lists animals with bilateral symmetry, triploblastic body, and a true body cavity (coelom).
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\nAnimals that are bilaterally symmetrical and triploblastic are typically found from Platyhelminthes onwards. A true coelom (body cavity lined by mesoderm) is present in annelids, molluscs, arthropods, echinoderms (larvae, adults secondarily radial), and chordates. Earthworms, leeches, and nereis are all annelids. Annelids are characterized by bilateral symmetry, a triploblastic body plan, and a true coelom (eucoelomate).
\n<\/section>\n
\nRoundworms (Nematodes, e.g., Ascaris) are bilaterally symmetrical and triploblastic, but they possess a pseudocoelom, not a true coelom. Sea cucumbers and sea urchins belong to Echinodermata, which, while triploblastic coelomates, exhibit radial symmetry in their adult stage (their larvae are bilateral). Therefore, the animals listed in option B (Earthworm, leech, nereis – all annelids) fit all three criteria.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following is correct with regards to animals with bilateral symmetry, triploblastic body and true body cavity? [amp_mcq option1=”Roundworm, earthworm and leech” option2=”Earthworm, leech and nereis” option3=”Ascaris, round worm and earthworm” option4=”Earthworm, sea cucumber and sea urchin” correct=”option2″] This question was previously asked in UPSC Geoscientist – 2020 Download PDFAttempt Online Option … <\/p>\n

Detailed SolutionWhich one of the following is correct with regards to animals with bil<\/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":[1091],"tags":[1288,1117,1243],"class_list":["post-86723","post","type-post","status-publish","format-standard","hentry","category-upsc-geoscientist","tag-1288","tag-biology","tag-taxonomy","no-featured-image-padding"],"yoast_head":"\nWhich one of the following is correct with regards to animals with bil<\/title>\n<meta name=\"description\" content=\"Option B lists animals with bilateral symmetry, triploblastic body, and a true body cavity (coelom). Animals that are bilaterally symmetrical and triploblastic are typically found from Platyhelminthes onwards. A true coelom (body cavity lined by mesoderm) is present in annelids, molluscs, arthropods, echinoderms (larvae, adults secondarily radial), and chordates. Earthworms, leeches, and nereis are all annelids. Annelids are characterized by bilateral symmetry, a triploblastic body plan, and a true coelom (eucoelomate).\" \/>\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-one-of-the-following-is-correct-with-regards-to-animals-with-bil\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following is correct with regards to animals with bil\" \/>\n<meta property=\"og:description\" content=\"Option B lists animals with bilateral symmetry, triploblastic body, and a true body cavity (coelom). Animals that are bilaterally symmetrical and triploblastic are typically found from Platyhelminthes onwards. A true coelom (body cavity lined by mesoderm) is present in annelids, molluscs, arthropods, echinoderms (larvae, adults secondarily radial), and chordates. Earthworms, leeches, and nereis are all annelids. Annelids are characterized by bilateral symmetry, a triploblastic body plan, and a true coelom (eucoelomate).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-correct-with-regards-to-animals-with-bil\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T04:19:27+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 one of the following is correct with regards to animals with bil","description":"Option B lists animals with bilateral symmetry, triploblastic body, and a true body cavity (coelom). Animals that are bilaterally symmetrical and triploblastic are typically found from Platyhelminthes onwards. A true coelom (body cavity lined by mesoderm) is present in annelids, molluscs, arthropods, echinoderms (larvae, adults secondarily radial), and chordates. Earthworms, leeches, and nereis are all annelids. Annelids are characterized by bilateral symmetry, a triploblastic body plan, and a true coelom (eucoelomate).","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\/which-one-of-the-following-is-correct-with-regards-to-animals-with-bil\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following is correct with regards to animals with bil","og_description":"Option B lists animals with bilateral symmetry, triploblastic body, and a true body cavity (coelom). Animals that are bilaterally symmetrical and triploblastic are typically found from Platyhelminthes onwards. A true coelom (body cavity lined by mesoderm) is present in annelids, molluscs, arthropods, echinoderms (larvae, adults secondarily radial), and chordates. Earthworms, leeches, and nereis are all annelids. Annelids are characterized by bilateral symmetry, a triploblastic body plan, and a true coelom (eucoelomate).","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-correct-with-regards-to-animals-with-bil\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T04:19:27+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\/which-one-of-the-following-is-correct-with-regards-to-animals-with-bil\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-correct-with-regards-to-animals-with-bil\/","name":"Which one of the following is correct with regards to animals with bil","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T04:19:27+00:00","dateModified":"2025-06-01T04:19:27+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Option B lists animals with bilateral symmetry, triploblastic body, and a true body cavity (coelom). 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