Biological organization
- Species: Organisms so genetically similar to one another that they can breed and produce offspring.
- Population: A group of individuals that belong to the same species and live in the same area.
size: the number of individuals in a given population
density: how crowded a population is
distribution: how organism is arranged in an area
age: how old is the average age in the population
sex: number of males to females
imigrations, emigrations
- Community: Different populations of species that live together in a distinct area.
- Ecosystem: A collection of all the organisms that live in a particular place together with their nonliving, or physical, environment.
- Biome: A group of ecosystems that have the same climate and dominant communities
- Biosphere: The combined portions of the Earth in which all of life exists, including land, water, and air. Extends from 8 kilometers above Earth's surface and 11 kilometers below.