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24 terms

Biology Chapter 2

ecology
STUDY
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habitat
where an organism lives
mutualism
when both species benefit
ecosystem
a system formed by the interaction of a community of organisms with their environment
niche
an organism's "job"
ecology
study of relationships between organisms and their environment
herbivore
an organism that only eats plants
biomass
weight of matter in any given feeding step
commensalism
one species benefits and the other is neither harmed nor benefitted
abiotic factor
nonliving things in the environment
population
total number of organisms of the same species
food web
model that shows feeding relationships
autotroph
organism that uses light to make its own food
parasitism
one species benefits and the other is harmed
symbiosis
the living together of two dissimilar organisms
biosphere
part of the earth that can support life
biotic factor
living things in the environment
omnivore
an organism that eats both plants and animals
saprobe
another name for a decomposer
trophic level
any class of organisms that occupy the same position in a food chain
carnivore
an organism that eats only meat
decomposer
an organism that lives off of dead and decaying organisms
food chain
shows how energy travels through an ecosystem
heterotroph
an organism requiring organic compounds that it gets from other organisms by eating them
biological community
all the populations of different species occupying a single ecosystem