The correct answer is: photorespiration<\/strong><\/p>\n\n\n\n Explanation:<\/strong><\/p>\n\n\n\n In C3 plants, water conservation can inadvertently promote photorespiration<\/strong>, a process that reduces the efficiency of photosynthesis. Here’s why:<\/p>\n\n\n\n C3 plants use the Calvin cycle to fix carbon dioxide, where the enzyme RuBisCO<\/strong> plays a central role. Under normal conditions, RuBisCO binds to CO\u2082 to produce a three-carbon compound. However, RuBisCO can also bind to oxygen (O\u2082)<\/strong> instead of CO\u2082, especially when the concentration of CO\u2082 inside the leaf is low. This alternative reaction leads to photorespiration, which consumes energy and releases fixed CO\u2082, thereby counteracting photosynthesis.<\/p>\n\n\n\n When water is scarce, C3 plants close their stomata<\/strong> (tiny pores on leaf surfaces) to prevent water loss through transpiration. But closing stomata also restricts the entry of CO\u2082 and limits its availability inside the leaf. At the same time, O\u2082\u2014produced during the light reactions of photosynthesis\u2014accumulates because it cannot diffuse out. The resulting low CO\u2082-to-O\u2082 ratio increases the likelihood that RuBisCO will fix oxygen rather than carbon dioxide, thus enhancing photorespiration<\/strong>.<\/p>\n\n\n\n Photorespiration is considered wasteful because it reduces the plant’s photosynthetic output without producing ATP or sugars. While it may have protective roles in certain contexts, such as detoxifying by-products or preventing photodamage, it generally reduces crop yield in C3 plants under hot, dry conditions.<\/p>\n\n\n\n In contrast, C4 and CAM plants have evolved mechanisms to concentrate CO\u2082 at the site of RuBisCO, thus minimizing photorespiration even when their stomata are closed. However, C3 plants, lacking such adaptations, suffer increased photorespiration under water-conserving conditions.<\/p>\n\n\n\n In summary<\/strong>, conservation of water in C3 plants typically leads to stomatal closure<\/strong>, reduced internal CO\u2082 levels, and a corresponding increase in photorespiration<\/strong>.<\/p>\n\n\n\n In C3 plants the conservation of water promotes: photorespirationphotosynthesisa shift to C4 photosynthesisthe light reactionsthe opening of stomata The correct answer and explanation is : The correct answer is: photorespiration Explanation: In C3 plants, water conservation can inadvertently promote photorespiration, a process that reduces the efficiency of photosynthesis. Here’s why: C3 plants use the Calvin […]<\/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-207446","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/207446","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=207446"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/207446\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=207446"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=207446"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=207446"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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\n\n\n\n<\/figure>\n","protected":false},"excerpt":{"rendered":"