DP Biology (first assessment 2025)

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Question 20N.2.SL.TZ0.d

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Date November 2020 Marks available [Maximum mark: 2] Reference code 20N.2.SL.TZ0.d
Level SL Paper 2 Time zone TZ0
Command term Suggest Question number d Adapted from N/A
d.
[Maximum mark: 2]
20N.2.SL.TZ0.d

The diagram shows the realized niches of the five species of warbler. Suggest how the fundamental niche of D. castanea might differ from its realized niche.

 

[2]

Markscheme

a. the realized is the actual niche and the fundamental is in the absence of competition;

b. with no competition the D. castanea would have a larger habitat/more food
OR
D.castanea could occupy the niches currently occupied by the other warbler species;

Accept named species.

Examiners report

Weaker candidates gave incomplete or confused suggestions in differentiating between the realised and fundamental niche.

Syllabus sections