Which of the following statements is NOT correct about the flatworms?
A) There are three complete tissue layers.
B) Flatworms may be either free living or parasitic.
C) Flatworms have a sac body plan,with only a mouth and no anus.
D) Parasitic flatworms have a well-developed head with eyespots and nerves concentrated into a brain.
E) Most planaria are found in marine environments,but some dwell in freshwater and moist terrestrial environments.
Correct Answer:
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