Question

a student conducted an experiment to show Co2 is released during respiration list two precautions that he or she must take for obtaining correct observations

Answer 1

1)Lime water should be freshly prepared
2)Seeds should be germinating and moist
Hope it helps you

Answer 2

1. neadly 70% of Co2 is transport to lungs in the form of potassium bicarbonate
2. nearly 23% of Co2 is transported in combination with haemoglobin