(a(i))[1]
State which organism has the lowest breathing rate.
(a(ii))[1]
State two organisms that have the same breathing rate.
(a(iii))[1]
State which organism has the breathing rate most similar to that of humans.
(b)[2]
A person moves from resting to exercising. Describe the changes in their breathing.
(c(i))[2]
State two other differences in composition between expired air and inspired air.
(c(ii))[2]
State the chemical used to test for carbon dioxide gas and the positive result of the test.
(d)[4]
Identify the structures labelled A, B, C and D in Fig. 2.1.