NEET BIOLOGY

Detailed explanation-1: -Dissolved oxygen is also produced as a waste product of photosynthesis from phytoplankton, algae, seaweed and other aquatic plants 8.

Detailed explanation-2: -Fish take water into their mouth, passing the gills just behind its head on each side. Dissolved oxygen is absorbed from-and carbon dioxide released to-the water, which is then dispelled. The gills are fairly large, with thousands of small blood vessels, which maximizes the amount of oxygen extracted.

Detailed explanation-3: -Carbon dioxide is the by-product of respiration of fish, plants and other organisms.

Detailed explanation-4: -During daylight hours plants normally produce more oxygen than they consume, thus providing oxygen for the fish and other organisms in the pond. Oxygen depletions are the most common cause of fish kills in ponds.

Detailed explanation-5: -Some may be surprised to learn that plants, like other tank inhabitants such as fish, respire. During this process, aquarium plants consume oxygen and the byproduct of respiration is CO2.