- Inhalation and Exhalation
Tick the correct answer:
Normal range of breathing rate per minute in an average adult person at rest is
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?