Apologia Biology 2nd Edition Mod. 2 Vocabulary Words

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An organism that causes disease

Pathogen

An organism that feeds on dead matter

Saprophyte

An organism that feeds on a living host

Parasite

An organism that requires oxygen

Aerobic organism

An organism that does not require oxygen

Anaerobic organism

A state in which members of a population die as quickly as new members are born

Steady state

Population growth that is unhindered because of the abundance of resources for an ever-increasing population

Exponential growth

Population growth that is controlled by limited resources

Logistic growth

A temporary union of two organisms for the purpose of DNA transfer

Conjugation

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

Plasmid

The transfer of a DNA segment from a nonfunctional donor cell to that of a functional recipient cell

Transformation

The process in which infection by a virus results in DNA being transferred from one bacterium to another

Transduction

The DNA and other essential parts of a bacterium coated with several hard layers

Endospore

Organisms within the same species with markedly different traits

Strains

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