1. Distribution: the number of individuals with each trait in a population
2. Histogram: a graph that uses bars to show how characteristics or values are distributed within a group
3. Population: a graph that uses bars to show how characteristics or values are distributed within a group
4. Trait: a specific characteristic of an individual organism
5. Variation: any difference in traits between individual organisms
6. Abiotic: not living organisms
7. Biotic: living organisms