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scince final notecards
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7
Science
7th Grade
05/10/2012

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Term
respiratory system
Definition
the system by which oxygen is taken into the body and an exchange of oxygen and carbon dioxide
Term
ecosystem
Definition
a system formed by the interaction of a community of organisms with their environment
Term
dichotomus key
Definition
a key used to identify a plant or animal
Term
recessive
Definition
alleles whose effect is masked by the activity of the second when both are present in the same cell or organism
Term
plasma
Definition
the liquid part of blood or lymph,
Term
hemoglobin
Definition
the oxygen-carrying pigment of red blood cells that gives them their red color
Term
central nervous system
Definition
the part of the nervous system comprising the brain and spinal cord.
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