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Arthropoda Classes Quiz

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Questions and Answers

Which class of ARTHROPODA includes King crabs and horseshoe crabs?

Xiphosura

What distinguishes Pycnogonida, a class of ARTHROPODA, from others?

Respiratory organs absent or vestigial. Length of body and abdomen usually much less than one half length of longest leg.

Describe the characteristics of Tardigrada, a class of ARTHROPODA.

Without any special respiratory organs. Reproductive organs opening into alimentary canal. Very small or microscopic animals with weakly chitinized integument.

What is unique about Pentatosmida, a class of ARTHROPODA?

It is vermiform and shows many minute transverse wrinkles or annulations. Internal parasites of vertebrates. Without legs in adult. Signup and view all the answers

How can you differentiate Crustacea from other classes of ARTHROPODA?

Crustacea have two pairs of antenna and five or more pairs of legs. They are aquatic. Signup and view all the answers

What are some common features of ARTHROPODA in general?

Bilateral symmetry, distinct body segmentation, sclerotized cuticle, periodic molting, hemocoel body cavity, articulated appendages, and eyes with ocelli. Signup and view all the answers

What is the key distinguishing feature of Onychophora (velvet worms) in terms of their legs?

Legs fleshly with numerous annulations but without any clearly articulated joints Signup and view all the answers

How many pairs of legs do millipedes (Diplopoda) typically have on their body segments?

Two pairs of legs on some, usually on most of body segments Signup and view all the answers

What is the unique characteristic of Pauropoda (pauropods) in relation to their antennae?

Antennae branched apically terminating in three multiarticulate setiform appendages Signup and view all the answers

How are the legs of Chilopoda (centipedes) different from other arthropods?

Legs terminating in a single tarsal claw; first pair of legs modified to form jaw-like poison fangs Signup and view all the answers

What is the respiratory system like in Arachnida (spiders, scorpions, mites, ticks)?

With a well-developed respiratory system composed of book lungs or of tubular tracheae opening by spiracles Signup and view all the answers

How many body regions do insects (Insecta) typically have?

Three body regions: head, thorax, abdomen Signup and view all the answers

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