DP Biology (last assessment 2024)
Question 18N.1.SL.TZ0.11
| Date | November 2018 | Marks available | [Maximum mark: 1] | Reference code | 18N.1.SL.TZ0.11 |
| Level | SL | Paper | 1 | Time zone | TZ0 |
| Command term | Deduce | Question number | 11 | Adapted from | N/A |
11.
[Maximum mark: 1]
18N.1.SL.TZ0.11
The graph shows the relationship between rate of photosynthesis and light intensity as influenced by both temperature and CO2 concentration.
What conclusion can be drawn from the data in the graph?
A. CO2 is always the limiting factor at low light intensities and temperatures.
B. Light intensity is only the limiting factor at high light intensities.
C. Temperature is only the limiting factor at high light intensities and CO2 concentrations.
D. Both temperature and light intensity are limiting factors at 660 ppm CO2 and less than 200 W m–2 light intensity.
[1]
Markscheme
C
