A lizard was placed in a chamber with a constant flow of air. The temperature of the chamber was varied between 25°C and 10 °C. Apart from temperature and time, all other variables were kept constant.
The carbon dioxide concentrations in the air leaving the chamber are shown in the graph.
[see graph below]
Which of the following statements is/are correct?
1 Between 25 °C and 10 °C the respiration rate of the lizard is inversely proportional to
the environmental temperature.
2 The data demonstrates that the lizard is only respiring aerobically.
3 The carbon dioxide could be detected by passing the air leaving the chamber through limewater.
A. none of them
B. 1 only
C. 2 only
D. 3 only
E. 1 and 2 only
F. 1 and 3 only
G. 2 and 3 only
H. 1, 2 and 3