The diagram illustrates the apparatus used at the start of an investigation into how temperature changes during seed germination. At the beginning of the investigation, the temperature in both flasks was $25\,^{\circ}\text{C}$. After two days, the temperature in flask 1 remains at $25\,^{\circ}\text{C}$. The temperature in flask 2 is $28\,^{\circ}\text{C}$. Which characteristic of living organisms is demonstrated by this experiment?
- Aexcretion
- Bgrowth
- Creproduction
- Drespiration