Name the different levels of organization within the biosphere, from smallest to largest.
The smallest level is the individual, or a single organism. The second level is a population, which is a group of individuals from the same population. The third level is a community, which is a group of populations, each of a different species. The fourth level is an ecosystem, which is a group of communities that live in a particular and distinct habitat. The fifth level is a biome, which is characterized usually by climate and geography. Biomes are generally extremely large and examples include tundra and desert. The last level is the biosphere, which embodies all biomes and all parts of earth where organisms exist.