Biology 2010 Student Edition

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

Chapter 21, Protists and Fungi - Assessment - 21.3 The Ecology of Protists - Understand Key Concepts/Think Critically - Page 629: 15



Work Step by Step

Option a. is incorrect. Photosynthetic protists are autotrophs, not heterotrophs. Option b. is incorrect. Not all photosynthetic protists are closely related to plants. Only the red algae are closely related to plants while other photosynthetic protists are closer to the nonphotosynthetic ones. Option d. is incorrect. Giant kelp does not play a role in the formation of coral reefs; rather, they house organisms in the coral reef and are a source of food for other organisms there. Option c. is correct. Phytoplankton consist of photosynthetic protists which are a source of food for organisms that live in oceans and lakes.
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