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 38 - Self-Quiz - Page 684: 3

Answer

Option c:air

Work Step by Step

Tracheae are air-filled tubes that deliver air directly into the insects' tissues.They open at the surface through paired structures called as spiracles.
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