In C3 plants the conservation of water promotes:<\/p>\n\n\n\n
photorespiration
photosynthesis
a shift to C4 photosynthesis
the light reactions
the opening of stomata<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n Correct Answer: Photorespiration<\/strong><\/p>\n\n\n\n In C3 plants<\/strong>, the conservation of water\u2014typically through closing stomata<\/strong> during hot or dry conditions\u2014can lead to photorespiration<\/strong> rather than enhancing photosynthesis. This is a significant physiological trade-off in plant biology.<\/p>\n\n\n\n C3 plants are named for the three-carbon compound (3-phosphoglycerate) that is the first product of carbon fixation in the Calvin cycle<\/strong>. The enzyme responsible for carbon fixation is RuBisCO (Ribulose-1,5-bisphosphate carboxylase\/oxygenase)<\/strong>. RuBisCO ideally binds with CO\u2082<\/strong> to form sugars during photosynthesis.<\/p>\n\n\n\n To prevent water loss under dry or hot conditions, C3 plants close their stomata. While this action helps reduce transpiration<\/strong> (the loss of water vapor), it also limits gas exchange<\/strong>, causing:<\/p>\n\n\n\n With less CO\u2082 and more O\u2082 in the leaf\u2019s internal atmosphere, RuBisCO<\/strong> is more likely to bind with oxygen<\/strong> instead of carbon dioxide. This leads to photorespiration<\/strong>, a process where:<\/p>\n\n\n\n Thus, water conservation in C3 plants ironically inhibits photosynthesis<\/strong> and promotes photorespiration<\/strong>, making it a wasteful<\/strong> process under such conditions.<\/p>\n\n\n\n Conclusion:<\/strong> In C3 plants the conservation of water promotes: photorespirationphotosynthesisa shift to C4 photosynthesisthe light reactionsthe opening of stomata The Correct Answer and Explanation is: Correct Answer: Photorespiration Explanation (300+ words): In C3 plants, the conservation of water\u2014typically through closing stomata during hot or dry conditions\u2014can lead to photorespiration rather than enhancing photosynthesis. This is a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-212695","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/212695","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=212695"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/212695\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=212695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=212695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=212695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\n\n\nExplanation (300+ words):<\/strong><\/h3>\n\n\n\n
C3 Photosynthesis Basics:<\/strong><\/h4>\n\n\n\n
Stomatal Closure and Water Conservation:<\/strong><\/h4>\n\n\n\n
\n
Why Photorespiration Increases:<\/strong><\/h4>\n\n\n\n
\n
Comparison with Other Options:<\/strong><\/h4>\n\n\n\n
\n
\n\n\n\n
In C3 plants, water conservation through stomatal closure leads to photorespiration<\/strong> due to low CO\u2082 and high O\u2082 levels inside the leaf, reducing the efficiency of photosynthesis.<\/p>\n","protected":false},"excerpt":{"rendered":"