Bacteria: structure, diversity, and roles in the environment and human life Bacteria Single-celled prokaryotes lacking a nucleus. Bacteria are metabolically diverse organisms that shape ecosystems, human health, industry, and scientific research.
Biotic (living components of ecosystems) Biotic Biotic describes living organisms—animals, plants, fungi and microorganisms—and their roles, interactions, and influence on ecosystems, biodiversity, and human activities.
