DP Biology (first assessment 2025)

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Question 19M.2.SL.TZ1.a.ii

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.2.SL.TZ1.a.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.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.

Syllabus sections