Question

Take three test-tubes. Fill 3/4th of each with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of CO₂?

Answer 1

• Test tube A will have the highest concentration of carbon dioxide. The experiment examines the interaction between plants and animals in terms of gaseous exchange.
• During breathing, the snail in test tube A inhales dissolved oxygen from the water and exhales CO₂.
• In addition to respiration, the water plant in test tube B performs a crucial photosynthetic function.
• During photosynthesis, the water plant collects CO₂, prepares food, and emits oxygen. In test tube C, plants absorb carbon dioxide generated by snails during breathing. As a result, tubes B and C have lower concentrations of carbon dioxide than test tube A.