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Apologia Biology
Mod 2--Vocabulary
13
Biology
9th Grade
09/09/2011

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Term
Pathogen
Definition
An organism that causes disease
Term
Saprophyte
Definition
An organism that feeds on dead matter.
Term
Parasite
Definition
An organism that fees on a living host.
Term
Aerobic organism
Definition
An organism that requires oxygen
Term
Anaerobic organism
Definition
An organism that does not require oxygen
Term
Steady state
Definition
A state in which members of a population die as quickly as new members are born
Term
Exponential growth
Definition
Population growth that is unhindered because of the abundance of resources for an ever-increasing population
Term
Logistic growth
Definition
Population growth that is controlled by limited resources
Term
Conjugation
Definition
A temporary union of two organisms for the purpose of DNA transfer.
Term
Plasmid
Definition
A small, circular section of extra DNA that confers one or more traits to a bacterium and can be reproduced separately from the main bacterial genetic code.
Term
Transformation
Definition
The transfer of a DNA segment from nonfunctional donor cell to that of a functional recipient cell.
Term
Transduction
Definition
The process in which infection by a virus results in DNA being transferred from one bacterium to another.
Term
Endospore
Definition
The DNA and other essential parts of a bacterium coated with several hard layers
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