IB Biology SL A3.1.5 Difficulties in Distinguishing Species Questions
Use spatial and population evidence to explain how gradual divergence can make species boundaries difficult to define.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Identify gradual divergence when a spatial or population pattern shows related populations becoming increasingly different.
IB Biology SL A3.1.5 Difficulties in Distinguishing Species Questions question 1
[Maximum number: 1]
The graph shows the song duration of birds from the genus Phylloscopus sampled from west to east throughout Northern Europe and Northern Asia.
What concept do these data illustrate?
A
Gradual divergence
B
Adaptive radiation
C
Interbreeding populations
D
Punctuated equilibrium
A
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