Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 40 - Sensory Systems in Plants - Review Questions - Synthesize: 3


Gravitropism would always need a physical movement based on gravity which could be sensed by a cell and lead to changed growth. This could take the form of the settling of the protoplast against the cell wall on the lower side of a cell.

Work Step by Step

The key is to see that gravitropism needs a direct sensing of gravity, just as light responses must involve absorption of light. Pick anything in or about a cell which would move in response to gravity, and build you model around that. Settling of the nucleus against the cytoskeleton could also be a basis for a model.
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.