Multiple Choice
Which of the following characteristics is found in vertebrates, but not in tunicates or lancelets?
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30. Overview of Animals
Overview of Animals
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Which of the following groups does not exhibit bilateral symmetry?
A
Arthropods
B
Chordates
C
Molluscs
D
Annelids
E
Jellies
Verified step by step guidance1
Understand the concept of bilateral symmetry: Bilateral symmetry is a body plan in which the left and right sides of an organism are mirror images of each other. This is common in many animal groups.
Identify the groups listed in the problem: Arthropods, Chordates, Molluscs, Annelids, and Jellies.
Review the characteristics of each group: Arthropods (e.g., insects, spiders) have bilateral symmetry. Chordates (e.g., mammals, birds) also exhibit bilateral symmetry. Molluscs (e.g., snails, clams) generally have bilateral symmetry, although some may have variations. Annelids (e.g., earthworms) are bilaterally symmetrical.
Consider the characteristics of Jellies: Jellies, or jellyfish, belong to the phylum Cnidaria. They exhibit radial symmetry, meaning their body plan is arranged around a central axis, not bilateral symmetry.
Conclude that Jellies do not exhibit bilateral symmetry, unlike the other groups listed, which do exhibit bilateral symmetry.
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