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Chapter 28: Q. 17 (page 776)

Crustaceans are _____.

a. ecdysozoans

b. nematodes

c. arachnids

d. parazoans

Short Answer

Expert verified

Option a is the correct answer.

Step by step solution

01

Introduction

There are a staggering number of species in the superphylum Ecdysozoa. This is because the Phylum Arthropoda and the Phylum Nematoda, two of the most diverse animal phyla, are present (the arthropods).

02

The explanation for the correct answer.

Crustaceans, a subphylum of the phylum Arthropoda that includes creatures like lobsters, shrimp, barnacles, and crabs, are one example.

03

The explanation for the incorrect options.

  • Nematodes, or roundworms, are members of the phylum Nematoda, whereas crustaceans are members of the phylum Arthropoda.
  • Arachnids are a class that are distinct from crustaceans since they are members of the phylum Arthropoda and the subphylum Chelicerata.
  • A subkingdom of ancient creatures is known as the parazoans.

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Most popular questions from this chapter

Explain the function of nematocysts in cnidarians.

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

A mantle and mantle cavity are present in:

a. phylum Echinodermata.

b. phylum Adversoidea.

c. phylum Mollusca.

d. phylum Nemertea.

Which group of flatworms are primarily ectoparasites of fish?

a. monogeneans

b. trematodes

c. cestodes

d. turbellarians

The nematode cuticle contains _____.

a. glucose

b. skin cells

c. chitin

d. nerve cells
See all solutions

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