Campbell Biology (10th Edition)

Published by Pearson
ISBN 10: 0321775651
ISBN 13: 978-0-32177-565-8

Chapter 27 - Test Your Understanding - Level 3 - Synthesis/Evaluation: 8

Answer

Please see the image. Since plant mass would be related to how much nitrogen it receives from the Rhizobium, something is more effective in some strains (3, 4) interaction with the plants than in others (2, 5). This could have to do with how well the plants' roots are colonized, how well the bacterium fixes nitrogen, or how well the exchange of nutrients with the plant occurs.
1478482215

Work Step by Step

You need to see that the only variation in the experiment has to do with the strain and that the growth of the plants should be related to the receipt of nitrogen from the bacterium. The variation should then be due to one or another factor in the fixing of nitrogen and its being turned over to the plant.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.