Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 4, Ecosystems and Communities - Assessment - 4.2 Niches and Community Interactions - Understand Key Concepts/Think Critically - Page 124: 8



Work Step by Step

Option a. is incorrect. Mutualism occurs when both species benefit. Option c. is incorrect. In commensalism, one species benefits while the other species suffers no effects. Option d. is incorrect. Succession is the process by which an ecosystem's species changes over time. Option b. is correct. The tick is benefiting whereas its host is being harmed. This is an example of a parasitic relationship.
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