Both vertebrates and echinoderms (sea urchins and sea stars) are deuterostomes.
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Q111: Within insects, the main evolutionary dividing line
Q112: All lophotrochozoans have:
A)radial symmetry and complex organs.
B)bilateral
Q113: Imagine that scientists have discovered annelid life
Q114: A close evolutionary relationship between annelids and
Q115: The group mollusks includes:
A)sponges and placozoans.
B)crustaceans and
Q117: The majority of all known animal species
Q118: _, such as sea squirts, share features
Q119: Ecdysozoans include insects and make up more
Q120: Bilaterians develop specialized organs because they have:
A)radial
Q121: Examine Figure 44.31, below. 
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