Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 11 - Test Your Understanding - Level 3 - Synthesis/Evaluation - Page 233: 9


These signalling systems would be needed for interactions between and among prokaryotic cells, such as when they exchange DNA during conjugation and when they cooperate, as when cyanobacteria and other prokaryotes form biofilms.

Work Step by Step

The key to this answer is to see that cell signalling requires some interaction between different cells. Then, try to imagine when prokaryotic cells interact (skimming chapters on cell structure and prokaryotic diversity may help).
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