Biology: The Unity and Diversity of Life (14th Edition)

Published by Brooks/Cole Publishing Co.
ISBN 10: 1305073959
ISBN 13: 978-1-30507-395-1

Chapter 21 - Self-Quiz - Page 352: 3


b. silica

Work Step by Step

The silica shell secreted by the diatoms is actually made up of two shells that come together and overlap one another, one fitting inside the other like a box and lid. The silica shell made by radiolaria consists of two layers, the inner layer enclosing the usual organelles found in eukaryotes and the outer layer containing vacuoles filled with gas to keep the organism afloat in water.
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