Biology 2010 Student Edition

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

Chapter 20, Viruses and Prokaryotes - Standardized Test Prep - Page 599: 2

Answer

A

Work Step by Step

Option B is incorrect. A methanogen is a type of prokaryotic organism that produces methane as a byproduct of metabolism. Option C is incorrect. Spirilli are spiral-shaped prokaryotes. Option D is incorrect. Bacilli are rod-shaped prokaryotes. Option A is correct. Cocci are ball-shaped prokaryotes.
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