(i) Freshwater inhabitant with streamlined body.
(ii) Two chambered heart.
(iii) Air bladder is present to regulate buoyancy.
(iv) Four pairs of gills with operculum
🗓 Dec 10, 2021
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Samantha🌐 India
Please please explain this answer to me
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Hailey🌐 India
I'm in exam, can any one give the solution for this question
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