IB Biology SL 4.1.10 Community structure Question Bank
Practise IB Biology SL 4.1.10 by defining communities and interpreting patterns in species distributions.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Define an ecological community as interacting populations of different species.
- Interpret distribution data to compare community structure across habitats.
C4.1.10—Community question 1
The relative abundance of different grass species in the 17 plant communities of the Serengeti ecosystem in Tanzania is presented in the graph below. The communities are listed along a transect that runs from the dry south-eastern boundary of the park (community 1), north and west across the plains and woodlands to Lake Victoria (community 17).
Question (a)
(a)
State the grass species that is most abundant in plant community 1 .
[ 1 ]
Question (b)
(b)
Both communities 1 and 17 have a low overall abundance of grasses. Suggest a reason for this in
[ 2 ]
Question (i)
(i)
Both communities 1 and 17 have a low overall abundance of grasses. Suggest a reason for this in community 1.
[ 1 ]
Question (ii)
(ii)
Both communities 1 and 17 have a low overall abundance of grasses. Suggest a reason for this in community 17.
[ 1 ]
Question (c)
(c)
Evaluate the conclusion that there are trends in the distribution of plants along the transect of Serengeti grass communities.
[ 3 ]
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