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What is Life?
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15
Biology
7th Grade
09/29/2010

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Term
Organism
Definition
a living thing
Term
Cell
Definition
the basic unit of structure and function in an organism
Term
Unicellular
Definition
single-celled organisms
Term
Multicellular
Definition
organisms that are composed of many cells
Term
Development
Definition
the process of change that occurs during an organisms life to produce a more complex organism
Term
Response
Definition
an action of change in behavior
Term
Reproduce
Definition
produce offspring that are similar to the parents
Term
The six characteristics of life
Definition
cellular organization, chemicals of life, energy use, growth and development, response, and reproduce
Term
spontaneous generation
Definition
the idea that living things arise from nonliving sources
Term
autotroph
Definition
organisms that make there own food and energy
Term
heterotrophs
Definition
organisms that consume energy from other sources from other sources and cannot make their own food
Term
homeostasis
Definition
the maintenace of stable internal conditions despite changes in external conditions
Term
photosynthesis
Definition
where plants and bacteria take energy from the sun and convert it into glucose
Term
chemosynthesis
Definition
where bacteria convert chemicals into energy without the sun
Term
the four needs of life
Definition
energy, water, living space, and stable internal conditions
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