Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1259188132
ISBN 13: 978-1-25918-813-8

Chapter 26 - The Origin and Diversity of Life - Review Questions - Understand - Page 525: 4

Answer

C.

Work Step by Step

The nucleus defines eukaryotes--all of them have one--so it comes first (C.). Mitochondria and chloroplasts are secondary traits for eukaryotes (A., B.), and so come after the nucleus. D. is wrong since there are many unicellular eukaryotes--they came first in the history of life.
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