Answer
b. RNA
Work Step by Step
Viroids contain only circular pieces of RNA with no protein coat, unlike a virus. These infectious agents do not make any proteins and only infect plants.
Biology: The Unity and Diversity of Life (14th Edition)
by Starr, Cecie; Taggart, Ralph; Evers, Christine; Starr, Lisa
Published by
Brooks/Cole Publishing Co.
ISBN 10:
1305073959
ISBN 13:
978-1-30507-395-1
Chapter 20 - Self-Quiz - Page 334: 2
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