Did you expect a change in color in either of the tubes without Elodea? Explain your answer.<\/p>\n\n\n\n
The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n Correct Answer:<\/strong> Explanation:<\/strong> If a test tube contains water with a CO\u2082-sensitive indicator but no Elodea, there should be no biological process occurring that would either absorb or release CO\u2082. In the absence of Elodea, there are no plant cells to carry out photosynthesis or cellular respiration. Since photosynthesis removes CO\u2082 from the solution and respiration releases CO\u2082, both of these processes rely on living cells.<\/p>\n\n\n\n Without Elodea and without any external addition of CO\u2082, the CO\u2082 level in the solution remains unchanged. As a result, the pH stays constant, and so does the color of the indicator. For example, if the initial color of bromothymol blue in the solution is green, indicating a neutral pH, it will remain green because there is no biological activity to alter the carbon dioxide concentration.<\/p>\n\n\n\n Only tubes with Elodea would potentially show a color change. In light, Elodea uses photosynthesis to absorb CO\u2082, raising the pH and turning the indicator blue. In darkness, Elodea undergoes cellular respiration, releasing CO\u2082, lowering the pH, and shifting the indicator to yellow.<\/p>\n\n\n\n Therefore, in the absence of Elodea, the solution remains chemically stable. No CO\u2082 is consumed or released, so the indicator shows no change in color. This confirms that Elodea is essential for causing a shift in carbon dioxide levels and, consequently, the color of the solution.<\/p>\n","protected":false},"excerpt":{"rendered":" Did you expect a change in color in either of the tubes without Elodea? Explain your answer. The correct answer and explanation is: Correct Answer:No, a change in color is not expected in the tubes without Elodea. Explanation:In an experiment involving Elodea and an indicator such as bromothymol blue, color changes help reveal whether carbon […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-36777","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/36777","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=36777"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/36777\/revisions"}],"predecessor-version":[{"id":36778,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/36777\/revisions\/36778"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=36777"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=36777"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=36777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
No, a change in color is not expected in the tubes without Elodea.<\/p>\n\n\n\n
In an experiment involving Elodea and an indicator such as bromothymol blue, color changes help reveal whether carbon dioxide (CO\u2082) is being added to or removed from the solution. Elodea, a photosynthetic aquatic plant, plays a key role in this process depending on whether it is exposed to light or kept in darkness.<\/p>\n\n\n\n