Chordates all possess which of the following, at least during embryological development?
A) a notochord
B) a dorsal nerve cord
C) a postanal tail
D) a bony skeleton
E) jaws
Correct Answer:
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Q87: The most diverse group of arthropods is
Q88: The Deuterostomia include:
A)echinoderms.
B)cnidarians.
C)chordates.
D)placozoans.
E)arthropods.
Q89: Arthropods are an incredibly successful group of
Q90: The Ecdysozoa include:
A)annelid worms.
B)mollusks.
C)sea anemones.
D)arthropods.
E)vertebrates.
Q91: If current changes in ocean temperature and
Q93: Bilaterian animals are divided into two monophyletic
Q94: Annelids are characterized by:
A)cylindrical, segmented bodies.
B)extensive nervous
Q95: Pollinating insects are in part responsible for
Q96: Members of the Ecdysozoa:
A)secrete an external cuticle.
B)secrete
Q97: Consider the phylogeny below. 
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