For example, are you asking about:

* Levels of organization? (e.g., cellular, tissue, organ, organism, population, community, ecosystem)

* Levels of classification? (e.g., domain, kingdom, phylum, class, order, family, genus, species)

* Levels of biological complexity? (e.g., simple vs complex organisms, prokaryotes vs eukaryotes)

* Levels of ecological interaction? (e.g., competition, predation, mutualism)

Once you clarify the levels, I can provide you with the specific characteristics that organisms exhibit at each one.