Others, such as the clam worm, are active, mobile predators that capture prey in jaws attached to their pharynges. |
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On the other hand some predatory polychaetes have neither jaws nor eversible pharynges. |
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The final category of phenotypes contains animals that fail to feed but regenerate full-length pharynges. |
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The high sulphur content encourages the regeneration of the pharynges mucous membrane. |
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Pharynges were removed from animals 4 5 mm in size, and starved for 7 days. |
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