Topic 1: Describing biodiversity and populations

4. Highest traditional taxonomic category in biological classification.
5. Non-living environmental factors such as temperature, water and nutrients.
6. Hierarchical classification system used to organise and name organisms.
8. Living components such as predators, food and disease that affect species distribution.
10. Variety of different species within an ecosystem.
12. Square sampling frame used to estimate abundance or distribution of organisms.
14. Taxonomic rank that groups related orders of organisms.
15. Biological classification group whose members can interbreed and produce fertile offspring.
17. Population growth pattern where numbers increase rapidly in a J-shaped curve.
18. Measure of how evenly individuals are distributed among species in a community.
19. Variation of genes within a population of a species.

1. Taxonomic rank below kingdom used to group organisms with similar body plans.
2. Sampling method that records species along a line across a habitat.
3. Statistical measure used to quantify biodiversity in a community.
6. Method used to estimate population size using capture–recapture data.
7. Population growth pattern that slows as it reaches carrying capacity forming an S-shaped curve.
9. Number of different species present in a particular area.
11. Variety of ecosystems, habitats and ecological processes in a region.
13. Identification tool that uses paired statements to classify organisms.
16. Taxonomic category used in the scientific naming of closely related species.