سؤال في الاحياء

[Modi_L]

السلام عليكم

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