DP Biology (first assessment 2025)
Question 19N.2.SL.TZ0.14b
| Date | November 2019 | Marks available | [Maximum mark: 2] | Reference code | 19N.2.SL.TZ0.14b |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | Evaluate | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 2]
19N.2.SL.TZ0.14b
(b)
Models are used as representations of the real world. Evaluate the use of food webs to represent ecological communities.
[2]
Markscheme
Advantages:
a. food webs summarize all possible food chains «in the community» ✔ OWTTE
b. realistic representation ✔
Limitations:
c. some communities/ecosystems are too complex to represent ✔
d. only shows qualitative information/not quantitative data
OR
saprotrophs/abiotic factors not taken into account ✔
Needs one advantage and one limitation to obtain [2].
Do not accept mentions of trophic levels.
