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Why do fish have gills?
in Grade 7 Natural Sciences by Diamond (79.8k points) | 6 views

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The presence of gills on a fish is an adaptation to life in water. Water flows through the mouth of a fish and passes over their gills which extract oxygen from it and the water is expelled from gill slits. Gills are necessary for a fish to breathe.
by Wooden (3.9k points)
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