What do you mean by dead zones?
Area where vegetation can survive.
Cold deserted areas where life can survive.
Areas where no vegetation and animal life can survive.
Areas where all animal life can survive.
Areas, where no vegetation and animal life can survive, is known as the dead zone.
Have you ever thought how do aquatic plants and animals survive? From where do they get oxygen? [3 MARKS]
Question 18 Wild animals like tiger, wolf, lion and leopard do not eat plants. Does this mean that they can survive without plants? Can you provide a suitable explanation?