Answer
Collagen fibrils is the material that occurs in the skeleton of all sponges.
Work Step by Step
Collagen is a structural protein. It occurs commonly in the skeleton of all sponges.
Animal Diversity 7th Edition
by Hickman Jr., Cleveland; Roberts, Larry; Keen, Susan; Larson, Allan; Eisenhour, David
Published by
McGraw-Hill Education
ISBN 10:
0073524255
ISBN 13:
978-0-07352-425-2
Chapter 6 - Review Questions - Page 141: 6
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