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BiologyBiology: The Unity and Diversity of Life (MindTap Course List)15th Edition
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The ______ and _______ are grouped as Ecdysozoa because they both molt. a. cnidarians / arthropods b. echinoderms / flatworms c. annelids / mollusks d. insects/roundworms

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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

Solutions

Chapter
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Problem 1DAA
Problem 2DAA
Problem 3DAA
Problem 1SQ
Problem 2SQ
Problem 3SQ
Problem 4SQ
Problem 5SQ
Problem 6SQ
Problem 7SQ
Problem 8SQ
Problem 9SQ
Problem 10SQ
Problem 11SQ
Problem 12SQ
Problem 13SQ
Problem 14SQ
Problem 15SQ
Problem 1CT
Problem 2CT
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 24, Problem 13SQ
Textbook Problem
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The ______ and _______ are grouped as Ecdysozoa because they both molt.

  1. a. cnidarians / arthropods
  2. b. echinoderms / flatworms
  3. c. annelids / mollusks
  4. d. insects/roundworms

Summary Introduction

Concept introduction: Ecdysozoans are invertebrates that molt. Molting refers to shedding followed by renewal of body parts as a part of growth process. Molting is also known as ecdysis and the hormones involves in molting are known as ecdysones.

Explanation of Solution

Reasons for correct statement:

The roundworms and the insects are grouped under the protostomes Clade: Ecdysozoa. The roundworms molt the collagen-rich cuticle that covers their body as they grow. The caterpillars of the Order: Lepidoptera molt and then form the pupa. The insect larval stages generally molt several times to undergo the complete metamorphosis.

 Option d. is given as “insects/roundworms”

As roundworms and insects molt their exoskeleton to grow in size, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “cnidarians/arthropods”...

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