DP Biology (last assessment 2024)
Question 18M.3.HL.TZ2.18
| Date | May 2018 | Marks available | [Maximum mark: 6] | Reference code | 18M.3.HL.TZ2.18 |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Evaluate | Question number | 18 | Adapted from | N/A |
18.
[Maximum mark: 6]
18M.3.HL.TZ2.18
Evaluate the impact of the introduction of a named invasive alien species into an environment.
[6]
Markscheme
a. name of alien species AND where introduced
b. how/reason alien species was introduced
OR
«expected» benefit for species being introduced
c. introduced alien species can escape into local ecosystems
OR
how it became invasive
d. «reference to principle of» competitive exclusion
OR
take over the niche of other organisms
e. can reproduce more than native species
f. relationship with predators
g. reduction in the numbers of endemic species / decrease in biodiversity
h. description of another effect on this alien species
Mark only the first example provided if more than one. Impacts must relate to named species.
