six character features of cyclostomata with example
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1.May be marine or fresh water in habitat.
2.Body is elongated and Eel like. Body is divisible into trunk and tail.
3.Paired fins are absent.
4.Skin is smooth, soft and slimy.
5. Notochord is persistent through out the life.
6.Pharyngeal gill-slits are found in which about 6-15 paires of gills are present.
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Answer:
cyclostomata
1. Body is grounded elongated like an eel.
2. Respiration occurs through gills.
3. Their heart is two chambered.
4. Development may be direct or indirect.
5. Notochord is present throughout the life.
6. excretory system is complete.
7. Example - petromyzon and myxine.
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