25. The Ecdysozoa includes the following taxa a. Arthropoda, Tardigrada, and Ony

ID: 206754 • Letter: 2

Question

25. The Ecdysozoa includes the following taxa

a. Arthropoda, Tardigrada, and Onychophora

b. Annelida, Arthropoda, and Onychophora

c. Arthropoda, Tardigrada, and Annelida

d. Mollusca, Annelida, and Arthropoda

e. None of the above

26. A paraphyletic taxon is one that contains

a. a single common ancestor and all of its descendants.

b. a single common ancestor and a subset of its descendants.

c. more than one common ancestor and all of their descendants.

d. more than one common ancestor and a subset of their descendants.

e. None of the above.

27. Sclerites are

a. hardened plates within the exoskeleton.

b. areas of the exoskeleton where plates abut one another creating distinctive lines.

c. areas of the exoskeleton dominated by endocuticle.

d. areas of the exoskeleton where scleritization is initiated immediately after ecdysis.

e. None of the above

28. Members of the Subphylum Hexapoda are characterized by having

a. three tagmata, two pair of maxillae, and one pair of mandibles.

b. three tagmata, two pair of wings, and one pair of mandibles.

c. three tagmata, one pair of maxillae, and one pair of mandibles.

d. two tagmata, one pair of maxillae, and one pair of mandibles.

e. None of the above

Answer to 1st question:

25. The Ecdysozoa includes the following taxa:

Ans:

a. Arthropoda, Tardigrada, and Onychophora

Ans26: b. a single common ancestor and a subset of its descendants.

Paraphyletic taxa does not include all decendants.

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