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ch 18 LS HRW
ch 18 LS HRW
21
Biology
7th Grade
04/04/2012

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Term
abiotic
Definition
describes the nonliving part of the environment, including water, rocks, light and temperature
Term
biosphere
Definition
the part of Earth where life exists; includes all of the living organisms on Earth
Term
biotic
Definition
describes living factors in the environment
Term
carnivore
Definition
an organism that eats animals
Term
carrying capacity
Definition
the largest population that an environment can support at any given time
Term
coevolution
Definition
the evolution of two species that is due to mutual influence, often in a way that makes the relationship more beneficial to both species
Term
commensalism
Definition
a relationship between two organisms in which one organism benefits and the other is unaffected
Term
community
Definition
all of the populations of species that live in the same habitat and interact with each other
Term
ecology
Definition
the study of the interactions of living organisms with one another and with their environment
Term
ecosystem
Definition
a community of organisms and their biotic, or nonliving, environment
Term
energy pyramid
Definition
a triangular diagram that shows an ecosystem's loss of energy, which results as energy passes through the ecosystem's food chain
Term
food chain
Definition
the pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms
Term
food web
Definition
a diagram that shows the feeding relationships between organisms in an ecosystem
Term
herbivore
Definition
an organism that eats only plants
Term
mutualism
Definition
a relationship between two species in which both species benefit
Term
omnivore
Definition
an organism that eats both plants and animals
Term
parasitism
Definition
a relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harned
Term
population
Definition
a group of organisms of the same species that live in a specific geographical area
Term
predator
Definition
an organism that kills and eats all or part of another organism
Term
prey
Definition
an organism that is killed and eaten by another organism
Term
symbiosis
Definition
a relationship in which two different organisms live in close association with each other
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