Biology, 08.06.2021 16:40 saniyaf125
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.
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Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.
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There are three complete tissue layers. b. Flatworms may be either free living or parasitic. c. Flat...
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