Components of Biodiversity
Genetic, species and ecosystem diversity, species richness, relative abundance and evidence used to compare communities.
How to study Higher Biology
Move from accurate biological mechanisms to unfamiliar data, experimental evidence and justified conclusions. Use current official materials for the written, extended-response and controlled-assignment formats that this question bank does not reproduce.
Core concepts
Concept 1
Distinguish genetic diversity, species diversity and ecosystem diversity.
Exam cue: Distinguish genetic diversity, species diversity and ecosystem diversity.
Concept 2
Use species richness and relative abundance together when comparing communities.
Exam cue: Use species richness and relative abundance together when comparing communities.
Concept 3
Select representative sampling and suitable indices or displays for biodiversity data.
Exam cue: Select representative sampling and suitable indices or displays for biodiversity data.
Risk pitfalls and guardrails
Equal species richness does not imply equal diversity when relative abundances differ.
Guardrail: Check vocabulary, sequence, direction, compartment, units and whether the evidence supports causation or only an association.
A larger sample can find more species, so sampling effort must be comparable.
Guardrail: Check vocabulary, sequence, direction, compartment, units and whether the evidence supports causation or only an association.
Memory anchors
Biodiversity levels
Genes, species, ecosystems.
Species diversity
Richness plus evenness.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Which three components make up biodiversity in the course?
What is genetic diversity within a population?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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