Fish takes oxygen through —

এই অধ্যায়ের আরও প্রশ্ন

• C-02-Q038Gills of fish are suitable for taking oxygen from —
• C-02-Q039Approximately what percentage of our required protein comes from fish?
• C-02-Q040Natural surface water in rivers, canals and lakes should be —
• C-02-Q041Turbid water is harmful to aquatic flora because it —
• C-02-Q042Which is a NATURAL reason for water turbidity?
• C-02-Q043Which is a MANMADE cause of turbidity?
• C-02-Q044Launches and steamers get stranded in Bangladesh mainly because of —
• C-02-Q045The presence of radioactive substances in river water can cause —
• C-02-Q046Waste materials in surface water may produce —
• C-02-Q047The minimum level of dissolved oxygen required for sustaining life in water bodies is —