. Community is a group of people with a common characteristic or interest living together within a larger society.. An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life.. Genus a group into which animals, plants, etc. that have similar characteristics are divided, smaller than a family and larger than a species.. A population is a group of organisms of the same species that live in the same area at the same time.