Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Alex thought that flower formation must be dependent on water. If this was true, he expected that the more water plants got, the more flowers they would produce. In order to test this, he obtained 200 identical petunia plants. He separated these into twenty groups of 10 plants each. He re-potted each petunia into identical containers, using the same bag of potting soil. He placed each group of plants in a large open field with no shade. Group 1 received only rain water. Each of the other groups received 10 additional ml of water, plants in group 3 received 20 additional ml of water and so on, so that plants in group 20 each received a total of 190 ml of water each evening, in addition to the rainwater. The plants were allowed to grow under these conditions for three months. When the plants bloomed, Alex recorded the number of blossoms on each petunia. Hypothesis and prediction Independent variable Dependent variable Controlled variables Control treatment So I am checking my work. First would the hypothesis and prediction be that the more water the petunia plants receive, the more flowers it produces? Is the independent variable water? The dependent variable will be the number of flowers? Is the controlled variables the different amounts of water? Is the control treatment the petunias that only Received rain water? Am I on the right track?
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