page 09 11. The effect of temperature on the metabolic rate of a snail was investigated using the respirometer shown. glass tube solution to absorb carbon dioxide scale (cm3) 0∙4 0∙0 0∙2 tap rubber stopper coloured liquid wire mesh platform snail The experiment was carried out at 10 °C, 15 °C, 20 °C and 25 °C. At each temperature, the tap was left open for 15 minutes then closed and readings were taken from the scale every 2 minutes. Identify how the dependent variable was measured. A Temperature change B Heat production C Oxygen consumption D Carbon dioxide production 12. Which row in the table identifies the temperature monitoring centre, and the location of an effector in thermoregulation in mammals? Temperature monitoring centre Location of effector A hypothalamus nerves B skin hypothalamus C hypothalamus skin D nerves hypothalamus [Turn over