ecology

mutualism: both organisms benefit
commensalism: only one organism benefits
parasitism: one organism benefits and the other gets hurt
host:A organism whose immune system has been invaded by a pathogenic organism
ninch: an adaptation to an organism that helps it survive
community: A group of interdependent organisms of different species growing or living together in a specified habitat
ecosystem:a community of species or arganisms that live and work together.
Population: the amount of organisms living in a community
Diversity:  a range of different things
Adaptation: a change tho help an organism survive
Decomposer: an organism that feeds off dead organisms