Ch. 14 Life and the Environment

size of a population that occupies an area of limited size

relationship that benefits the parasite and does harm to the host body

any biotic or abiotic factor that restrict the number of individuals in a population

part of the Earth that supports organisms, is the highest level of biological organization, and is made up of all Earth’s ecosystems

symbiotic relationship that benefits one partner but does not harm or help the other

all the nonliving, physical features of the environment (including light, soil, water, temperature, and help determine what species can live in that environment)

consists of a biotic community and the abiotic factors that affect it

largest number of individuals an environment ca support and maintain over a long period of time

any close relationship between two or more different species

living or once-living organisms in the environment

symbiotic relationship that benefits both species

all the individuals of one species that live in the same area at the same time and compete with each other for food, water, mates, and space

role of an organism in the ecosystem, including what it eats, how it interacts with other organisms, and how it gets its food

study of the interactions that take place among organisms and between organisms and the physical features of the environment

physical location where an organism lives

all the populations of different species that live in the same place at the same time

model used to describe a series of overlapping food chains and that shows the many organisms that feed on more than one level in an ecosystem

model that describes the feeding relationships in a community, usually has three or four links, and shows how energy in the form of food passes from one organism to another