| Date | November 2017 | Marks available | 1 | Reference code | 17N.3.HL.TZ0.17 |
| Level | Higher level | Paper | Paper 3 | Time zone | TZ0 |
| Command term | Define | Question number | 17 | Adapted from | N/A |
Question
Define fundamental niche.
[1]
a.i.
Outline a reason for organisms seldom occupying their entire fundamental niche.
[1]
a.ii.
Describe the relationship between Zooxanthellae and reef-building coral species.
[2]
b.
Markscheme
the potential/full range of conditions under which an organism can live
a.i.
competition for resources/named resource
OR
competitive exclusion «limits the niche»
a.ii.
a. «endo»symbiotic/mutualistic relationship
b. zooxanthellae/photosynthetic algae/dinoflagellates live in coral tissues
c. coral provides protection for algae/dinoflagellates
d. algae/dinoflagellates provide minerals/products of photosynthesis/oxygen/sugars to coral
[Max 2 Marks]
b.
Examiners report
[N/A]
a.i.
[N/A]
a.ii.
[N/A]
b.
Syllabus sections
Option C: Ecology and conservation » Option C: Ecology and conservation (Core topics) » C.1 Species and communities
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