Answer
It prevents predation, protecting the plant.
Work Step by Step
Since nicotine is poisonous to most animals that might try to eat the tobacco plant, its production is worth the energy investment as it increases the plant's odds of survival.
Campbell Biology (12th Edition)
by Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Published by
Pearson
ISBN 10:
0135188741
ISBN 13:
978-0-13518-874-3
Chapter 55 - 55.3 - Concept Check - Page 1248: 2
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