DP Biology (last assessment 2024)

Test builder »

Question 18M.3.HL.TZ2.16a

Select a Test
Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.HL.TZ2.16a
Level HL Paper 3 Time zone TZ2
Command term Distinguish Question number a Adapted from N/A
a.
[Maximum mark: 1]
18M.3.HL.TZ2.16a

The model describes the fundamental and realized niches of a species of microscopic marine arthropod in the Northern hemisphere with respect to two different factors (X and Y). The abundance of the species is shown over twelve months. The fundamental niche is separated into five zones ranging from critical to optimal conditions. The population of the species in its realized niche each month is represented by an oval. The size of each oval shows the population abundance.

(a)

Distinguish between fundamental niche and realized niche.

[1]

Markscheme

fundamental niche is all potential conditions a species could live in whereas realized niche is actual conditions under which the species live

Syllabus sections