Question

What will happen if we keep a fish in a closed container without any aquatic plant give reason

Answer 1

Fish in a closed container without any aquatic plant will die after some time.aquatic plants,through the process of photosynthesis could supply oxygen to the fishes,if this were present in the closed container along with the fish.but without any aquatic plant or an external source of oxygen,fish will not be able to survive in that closed container.