Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to
A. take in oxygen from air
B. take in oxygen dissolved in water
C. absorb nutrients present in water
D. release waste substances in water
Answer:B
Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to
A. take in oxygen from air B. take in oxygen dissolved in water C. absorb nutrients present in water D. release waste substances in water