DP Biology (last assessment 2024)
Question 18M.3.HL.TZ1.15c
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.HL.TZ1.15c |
| Level | HL | Paper | 3 | Time zone | TZ1 |
| Command term | Compare and contrast | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 2]
18M.3.HL.TZ1.15c
(c)
Compare and contrast food chains and food webs.
[2]
Markscheme
Similarities:
a. in both food webs and chains organisms are arranged by trophic levels/feeding positions
b. both represent the transfer of food/energy in an ecosystem
c. both include producers and consumers
Differences:
d. one species could occupy different trophic levels in a food web but not in a food chain / converse
e. food chain represents one possible feeding option for each organism but food web represents more possible feeding relationships/trophic levels
OWTTE
(max 1 for similarities)
(max 1 for differences)
