DP Biology (first assessment 2025)
Question 19M.2.SL.TZ1.17a.ii
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.2.SL.TZ1.17a.ii |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Suggest | Question number | a.ii | Adapted from | N/A |
a.ii.
[Maximum mark: 2]
19M.2.SL.TZ1.17a.ii
(a.ii)
Suggest two possible reasons for the change in distribution.
1.
2.
[2]
Markscheme
a. no predators ✔
b. ample food supply/habitats ✔
c. few competitors ✔
d. resistant to disease ✔
e. high reproductive rate ✔
f. no physical barrier to prevent spread of grey squirrels on mainland ✔
Examiners report
This was answered well by only a few students even though the mark scheme allowed for a wide range of answers.
