{"id":90589,"date":"2025-06-01T10:31:34","date_gmt":"2025-06-01T10:31:34","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90589"},"modified":"2025-06-01T10:31:34","modified_gmt":"2025-06-01T10:31:34","slug":"which-one-of-the-following-pairs-is-not-correctly-matched-27","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-pairs-is-not-correctly-matched-27\/","title":{"rendered":"Which one of the following pairs is not correctly matched?"},"content":{"rendered":"

Which one of the following pairs is not correctly matched?<\/p>\n

[amp_mcq option1=”Positively phototropic : Shoot” option2=”Positively geotropic : Root” option3=”Chemotropic : Pollen tube” option4=”Hydrotropic : Flower” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2021<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nTropisms are directional growth responses of plants to external stimuli. They are named based on the type of stimulus and the direction of growth (positive if towards the stimulus, negative if away).
\n<\/section>\n
\nPositively phototropic growth means growth towards light (e.g., shoots). Positively geotropic growth means growth towards gravity (e.g., roots growing downwards). Chemotropic growth is a response to chemical stimuli (e.g., pollen tube growing towards the ovule guided by chemical signals). Hydrotropic growth is a response to water (e.g., roots growing towards water). Flowers are reproductive structures whose position and development are influenced by factors like light (photoperiodism for flowering) and hormones, but ‘hydrotropism’ is not a primary or characteristic tropic response of flowers themselves. Roots exhibit positive hydrotropism.
\n<\/section>\n
\nOther types of tropism include thigmotropism (response to touch) and thermotropism (response to temperature). The statement ‘Hydrotropic : Flower’ is the incorrectly matched pair as hydrotropism is characteristic of roots.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following pairs is not correctly matched? [amp_mcq option1=”Positively phototropic : Shoot” option2=”Positively geotropic : Root” option3=”Chemotropic : Pollen tube” option4=”Hydrotropic : Flower” correct=”option4″] This question was previously asked in UPSC CAPF – 2021 Download PDFAttempt Online Tropisms are directional growth responses of plants to external stimuli. They are named based on … <\/p>\n

Detailed SolutionWhich one of the following pairs is not correctly matched?<\/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":[1085],"tags":[1110,1117,1118],"class_list":["post-90589","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1110","tag-biology","tag-plant-physiology","no-featured-image-padding"],"yoast_head":"\nWhich one of the following pairs is not correctly matched?<\/title>\n<meta name=\"description\" content=\"Tropisms are directional growth responses of plants to external stimuli. They are named based on the type of stimulus and the direction of growth (positive if towards the stimulus, negative if away). Positively phototropic growth means growth towards light (e.g., shoots). Positively geotropic growth means growth towards gravity (e.g., roots growing downwards). Chemotropic growth is a response to chemical stimuli (e.g., pollen tube growing towards the ovule guided by chemical signals). Hydrotropic growth is a response to water (e.g., roots growing towards water). Flowers are reproductive structures whose position and development are influenced by factors like light (photoperiodism for flowering) and hormones, but 'hydrotropism' is not a primary or characteristic tropic response of flowers themselves. Roots exhibit positive hydrotropism.\" \/>\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-pairs-is-not-correctly-matched-27\/\" \/>\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 pairs is not correctly matched?\" \/>\n<meta property=\"og:description\" content=\"Tropisms are directional growth responses of plants to external stimuli. They are named based on the type of stimulus and the direction of growth (positive if towards the stimulus, negative if away). Positively phototropic growth means growth towards light (e.g., shoots). Positively geotropic growth means growth towards gravity (e.g., roots growing downwards). Chemotropic growth is a response to chemical stimuli (e.g., pollen tube growing towards the ovule guided by chemical signals). Hydrotropic growth is a response to water (e.g., roots growing towards water). Flowers are reproductive structures whose position and development are influenced by factors like light (photoperiodism for flowering) and hormones, but 'hydrotropism' is not a primary or characteristic tropic response of flowers themselves. Roots exhibit positive hydrotropism.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-pairs-is-not-correctly-matched-27\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:31:34+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 pairs is not correctly matched?","description":"Tropisms are directional growth responses of plants to external stimuli. 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