سؤال في الاحياء
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وش الجواب الصحيح لهذا السؤال
Gills __________
increase the surface area for gas exchange
are extensions of the body AND increase the surface area for gas exchange
absorb carbon dioxide
are extensions of the body
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Gills __________
absorb carbon dioxide AND release oxygen
increase the surface to volume ratio
release oxygen
absorb carbon dioxide
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