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14 Cards in this Set

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  • Back
organisim
Organisims are living things.
cell
A cell is the basic unit of stucture and function in an organisim.
unicellular
Unicellular, or single-celled organisims, include bacteria, the most numerous organisims on earth.
multicellular
Multicellular oganisims are composed od manr cells.
development
Development is the process of becoming more complex organisim.
stimulus
A change in an organisim's surroundings that causes the organisim to react is called a stimulus.
response
An organisim reats to a stimulus with a responce-an action or change in behavior.
reproduce
To produce offspring that are similar to the parents
spontaneous generation
People once believed the mistaken idea that living things arise from nonliving sources.
controlled experiment
In a controlled exeriment, a scientist carries out two tests that are identical in every respect except for one factor, called the variable.
variable
A change
autotroph
Organisims that make their own food.
heterotroph
Organisims that cannot make their own food.
homeostasis
The maintenance of stable internal conditions despite changes in surroundings.