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Ch. 18 Sec. 1 and 2
Vocabulary for Ch. 18 Sec. 1 and 2
19
Biology
9th Grade
09/03/2009

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Term
ecology
Definition
th estudy of interactions between organisms and the living and nonliving components of their environment
Term
interdependence
Definition
all organisms interact with other organisms in their surroundings and with the nonliving portion of their environment
Term
ecological model
Definition
a model to represent or describe the components of an ecological system
Term
biosphere
Definition
the thin volume of earth and its atmosphere that supports life
Term
ecosystem
Definition
all of the organisms and the nonliving environment found in a particular place
Term
community
Definition
all the interacting organisms living in an area
Term
population
Definition
all the members of a species that live in one place at one time
Term
habitat
Definition
the place where an organism lives
Term
biotic factors
Definition
all of the living things that affect an organism
Term
abiotic factors
Definition
the physical and chemical characteristics of the environment
Term
tolerance curve
Definition
a graph of performence versus values of an environmental variable, such as temperature
Term
acclimation
Definition
the process of organisms adjusting to abiotic factors
Term
conformers
Definition
the organisms that do not regulate their internal conditions; they change as their external environment changes
Term
regulators
Definition
organisms that use energy to control some of their internal conditions
Term
dormancy
Definition
a long-term startegy is to enter a state of reduced activity
Term
migration
Definition
a strategy to move organisms to a more favorable habitat
Term
niche
Definition
the specific role or way of life of a species within its environment
Term
generalists
Definition
species with broad niches
Term
specialists
Definition
organisms with narrow niches
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