Question 19M.3.HL.TZ1.a.i
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.3.HL.TZ1.a.i |
| Level | HL | Paper | 3 | Time zone | TZ1 |
| Command term | Outline | Question number | a.i | Adapted from | N/A |
In Wales, UK, the grey squirrel (Sciurus carolinensis) is an alien species and the red squirrel (Sciurus vulgaris) is endemic. The maps show the distribution of red and grey squirrels in 1945 and 2010.
[Source: © The Red Squirrel Survival Trust]
Outline the changes of distribution of the grey squirrel from 1945 to 2010.
[2]
a. overall the grey squirrel distribution has increased «and the red squirrel decreased» ✔
b. in 2010 the grey squirrel was found in areas where it was previously not found ✔
c. grey squirrel has dominated/red squirrel virtually eliminated ✔
OWTTE
While most candidates were able to achieve a mark by noting that the grey squirrel “dominated” in the second map, students again lost marks due to an inability to communicate concepts clearly. A large number of students confused distribution with population size, an idea not addressed in the maps.
