A4.2.2—Current vs. past biodiversity Topic Practice
A4.2.2—Current vs. past biodiversity Topic Practice
Students practise interpreting fossil record limitations and evaluating claims about current species richness relative to deep time using IPBES-style uncertainty framing.
How this is tested
- explain why radiometric dating of fossils cannot reliably determine past global species richness
- distinguish between estimated total species (≈9 million) and described species when evaluating biodiversity trends