On a week end, Shubham went on a picnic with this his parents. There was a beautiful view of a lake but suddenly, Shubham saw some fish floating on the surface of water of the lake as they had died. Shubham asked his parents why these fish had died. They told him that fish also need oxygen for their survival as we do. Dissolved oxygen in the water gets depleted due to discharge of human sewage and organic wastes of the industries into the lake water. After reading the above paragraph, answer the following questions: (b) Hoe dissolved oxygen gets depleted due to presence of the organic waste?

On a week end, Shubham went on a picnic with this his parents. There w

1.	On a week end, Shubham went on a picnic with this his parents. There was a beautiful view of a lake but suddenly, Shubham saw some fish floating on the surface of water of the lake as they had died. Shubham asked his parents why these fish had died. They told him that fish also need oxygen for their survival as we do. Dissolved oxygen in the water gets depleted due to discharge of human sewage and organic wastes of the industries into the lake water. After reading the above paragraph, answer the following questions: (b) Hoe dissolved oxygen gets depleted due to presence of the organic waste?
Answer» SOLUTION :(b) MICROORGANISMS which decompose the organic WASTE need oxygen. The AMOUNT of oxygen consumed is proportional t the amount of waste present. THUS, sufficient dissolved oxygen no longer remains available for the survival of the fish .