Question

Take three test-tubes. Fill three fourth 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

Answer:

test tubeC will contain more amount of carbon dioxide

Explanation:

because all organisms respire and leave out carbon dioxide as snail will leave out co2 and plant will absorb co2 .So,test tube3 will contain more amount of co2

Answer 2

Test tube A will have the highest concentration of $CO_2$ because test tube A will have snail which expels out $CO_2$ into the tube,in tube C, there is a plant which inhale $CO_2$ to decrease $CO_2$ concentration in tube C.