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19 terms

Chapter 2LIving Things

STUDY
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ecology
The study of interactions of living organisms with one another and with their envirorment.
biotic
Describes living elements in the envirorment.
abiotic
Describes the nonliving part of the enviorment.
poppulation
A group of organisms of the same species that live in a specific geographical area.
Community
All the poppulations of species that live together.
ecosystem
a community of organisms and their abiotic environment
biosphere
the part of earth where life exists
herbivore
organism that obtains energy by eating only plants
carnivore
organism that obtains energy by eating animals
omnivore
an animal that eats both plants and animals
food chain
a series of steps in which organisms transfer energy by eating and being eaten
food web
a diagram that shows the feeding relationships between organisms in an ecosystem
carrying capacity
The largest population that an area can support
prey
an organism that is killed and eaten by another organism
preditor
organism that eats other organisms
symbiosis
relationship in which two species live closely together
mutalism
A relashinship between species where both benefit
commensalism
a relationship between two organisms in which one organism benefits and the other is unaffected
parasitism
A relationship between two organisms of different species where one benefits and the other is harmed