An animal with bilateral symmetry
a. has left and right sides.
b. usually displays cephalization.
c. produces mirror images regardless of the number of "cuts" through the central axis.
d. has left and right sides and usually displays cephalization.
e. has left and right sides, usually displays cephalization, and produces mirror images regard-less of the number of "cuts" through the central axis.

Question

An animal with bilateral symmetry
a.	has left and right sides.
b.	usually displays cephalization.
c.	produces mirror images regardless of the number of "cuts" through the central axis.
d.	has left and right sides and usually displays cephalization.
e.	has left and right sides, usually displays cephalization, and produces mirror images regard-less of the number of "cuts" through the central axis.

blues · Answer

D. Bilateral animals often (but not necessarily) form a head, or at least an end with additional sensory and nervous function.