{"id":87753,"date":"2025-06-01T06:53:31","date_gmt":"2025-06-01T06:53:31","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87753"},"modified":"2025-06-01T06:53:31","modified_gmt":"2025-06-01T06:53:31","slug":"in-a-dicot-pot-herb-vaseline-vegetable-oil-was-applied-on-the-upper-s","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/in-a-dicot-pot-herb-vaseline-vegetable-oil-was-applied-on-the-upper-s\/","title":{"rendered":"In a dicot pot herb, vaseline\/vegetable oil was applied on the upper s"},"content":{"rendered":"

In a dicot pot herb, vaseline\/vegetable oil was applied on the upper surface of one leaf (Experimental leaf 1) and on the lower surface of another leaf (Experimental leaf 2). Vaseline\/Vegetable oil was not applied on the control leaf. The plant was deliberately not watered for several days. Which leaf will dry up last?<\/p>\n

[amp_mcq option1=”Experimental leaf 1″ option2=”Experimental leaf 2″ option3=”Control leaf” option4=”All the leaves will dry up simultaneously” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2021<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is B) Experimental leaf 2. Applying vaseline\/vegetable oil to the lower surface of the leaf blocks most of the stomata, significantly reducing water loss through transpiration.
\n<\/section>\n
\n– Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers.
\n– Stomata are pores on the leaf surface, primarily on the lower surface in dicots, that regulate gas exchange and transpiration.
\n– Blocking stomata reduces the rate of transpiration and thus water loss.
\n<\/section>\n
\n– Experimental leaf 1 has vaseline on the upper surface, leaving most stomata on the lower surface open, so it will lose water almost as fast as the control leaf.
\n– The control leaf loses water normally from both surfaces (mainly lower).
\n– Since Experimental leaf 2 loses the least amount of water due to blocked stomata on the lower surface, it will dry up last among the three leaves when the plant is not watered.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

In a dicot pot herb, vaseline\/vegetable oil was applied on the upper surface of one leaf (Experimental leaf 1) and on the lower surface of another leaf (Experimental leaf 2). Vaseline\/Vegetable oil was not applied on the control leaf. The plant was deliberately not watered for several days. Which leaf will dry up last? [amp_mcq … <\/p>\n

Detailed SolutionIn a dicot pot herb, vaseline\/vegetable oil was applied on the upper s<\/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":[1093],"tags":[1110,1117,1118],"class_list":["post-87753","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1110","tag-biology","tag-plant-physiology","no-featured-image-padding"],"yoast_head":"\nIn a dicot pot herb, vaseline\/vegetable oil was applied on the upper s<\/title>\n<meta name=\"description\" content=\"The correct answer is B) Experimental leaf 2. Applying vaseline\/vegetable oil to the lower surface of the leaf blocks most of the stomata, significantly reducing water loss through transpiration. - Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. - Stomata are pores on the leaf surface, primarily on the lower surface in dicots, that regulate gas exchange and transpiration. - Blocking stomata reduces the rate of transpiration and thus water loss.\" \/>\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\/in-a-dicot-pot-herb-vaseline-vegetable-oil-was-applied-on-the-upper-s\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"In a dicot pot herb, vaseline\/vegetable oil was applied on the upper s\" \/>\n<meta property=\"og:description\" content=\"The correct answer is B) Experimental leaf 2. Applying vaseline\/vegetable oil to the lower surface of the leaf blocks most of the stomata, significantly reducing water loss through transpiration. - Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. - Stomata are pores on the leaf surface, primarily on the lower surface in dicots, that regulate gas exchange and transpiration. - Blocking stomata reduces the rate of transpiration and thus water loss.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/in-a-dicot-pot-herb-vaseline-vegetable-oil-was-applied-on-the-upper-s\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:53:31+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":"In a dicot pot herb, vaseline\/vegetable oil was applied on the upper s","description":"The correct answer is B) Experimental leaf 2. 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Applying vaseline\/vegetable oil to the lower surface of the leaf blocks most of the stomata, significantly reducing water loss through transpiration. - Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. - Stomata are pores on the leaf surface, primarily on the lower surface in dicots, that regulate gas exchange and transpiration. - Blocking stomata reduces the rate of transpiration and thus water loss.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/in-a-dicot-pot-herb-vaseline-vegetable-oil-was-applied-on-the-upper-s\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:53:31+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\/in-a-dicot-pot-herb-vaseline-vegetable-oil-was-applied-on-the-upper-s\/","url":"https:\/\/exam.pscnotes.com\/mcq\/in-a-dicot-pot-herb-vaseline-vegetable-oil-was-applied-on-the-upper-s\/","name":"In a dicot pot herb, vaseline\/vegetable oil was applied on the upper s","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:53:31+00:00","dateModified":"2025-06-01T06:53:31+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is B) Experimental leaf 2. 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