DP Biology (first assessment 2025)

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Question 19N.2.SL.TZ0.13b

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.2.SL.TZ0.13b
Level SL Paper 2 Time zone TZ0
Command term Compare and contrast Question number b Adapted from N/A
b.
[Maximum mark: 2]
19N.2.SL.TZ0.13b
(b)

Compare and contrast fundamental and realized niche of a species.

[2]

Markscheme

a. both describe the habitat/role/relationship occupied by a species ✔

b. the fundamental niche is the potential role of a species in its ecosystem and realized niche is the actual role
OR
the fundamental niche depends on the adaptations of a species whereas the realized niche is limited by competition/predation
OR
realized niche is ‹usually› smaller than fundamental niche ✔

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