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Chapter 28: Q. 16 (page 776)

The nematode cuticle contains _____.

a. glucose

b. skin cells

c. chitin

d. nerve cells

Short Answer

Expert verified

Option c is the correct answer.

Step by step solution

01

Introduction

The class of roundworms known as Nematoda exhibits a cylindrical shape. These organisms are pseudocoelomates and are distinguished by having a fully functional digestive system. Nematodes' cuticle creates an exterior skeleton that is located outside of their epidermis.

02

The explanation for the correct answer.

The cuticle, an exterior structure present on all nematodes, is essential to their growth and survival. Collagen is the main material in this structure; it is secreted by the hypodermal cells beneath.

03

The explanation for the incorrect options.

Nematodes do not have neurons, glucose, or skin cells in their cuticle since these tissues don't help animals create an exterior skeleton.

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Most popular questions from this chapter

Which group of flatworms are primarily ectoparasites of fish?

a. monogeneans

b. trematodes

c. cestodes

d. turbellarians

Which of the following statements is false?

a. Choanocytes have flagella that propel water through the body.

b. Pinacocytes can transform into any cell type.

c. Lophocytes secrete collagen.

d. Porocytes control the flow of water through pores in the sponge body

Why are tardigrades essential to recolonizing habits following destruction or mass extinction?

Echinoderms have _____.

a. triangular symmetry

b. radial symmetry

c. hexagonal symmetry

d. pentaradial symmetry

How does a change in the circulatory system organization support the body designs in cephalopods compared to other mollusks?

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