They are a marine worm of which there are about 10,000 species. They occur throughout the Earth's oceans at all depths (even the deepest place on Earth)
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no,we still have 40,000 species of polychaetes
Polychaetes are gonochoristic animals, while oligochaetes are hermaphrodites.
Phylum: Annelida
On Plato the answer is (D)
leeches are sthnakes.
Prostomium
Sea worms (polychaetes)
J. D. George has written: 'Polychaetes: British amphinomida, spintherida & eunicida' -- subject(s): Eunicidae, Amphinomida, Polychaeta 'Polychaetes' -- subject(s): Polychaeta
Pavel Vladimirovich Ushakov has written: 'Mnogoshchetinkovye chervi Polychaeta' -- subject(s): Bibliography, Polychaeta 'Polychaetes of the suborder Phyllodociformia of the Polar Basin and the northwestern part of the Pacific: Families Phyllodocidae, Alciopidae, Tomopteridae, ... of the U.S.S.R' 'Polychaetes of the suborder Phyllodociformia of the Polar Basin and the northwestern part of the Pacific. (Families Phyllodocidae, Alciopidae, Tomopteridae, Typhloscoleoidae, and Lacydoniidae)' -- subject(s): Polychaeta, Annelida 'Polychaetes' -- subject(s): Polychaeta 'Polychaetes of the suborder Phyllodociformia of the Polar Basin and the northwestern part of the Pacific'
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earthworms, polychaete worms, and leeches.