Fossil Evidence Indicates That the Earliest Deuterostomes Were Bilaterally Symmetrical

Multiple Choice

Fossil evidence indicates that the earliest deuterostomes were bilaterally symmetrical, segmented animals with a pharynx that had slits through which water flowed.Adult echinoderms have pentaradial (five-radial) symmetry.Therefore,

A) bilateral symmetry is a derived character in deuterostomes.
B) adult pentaradial symmetry is a derived character in echinoderms.
C) bilateral symmetry is a derived character in echinoderm larvae.
D) pentaradial symmetry has evolved multiple times in deuterostomes.
E) adult pentaradial symmetry is the ancestral condition in deuterostomes.