An organism that causes disease.
An organism that feeds on dead matter.
an organism that feeds on a living host.
An organism that requires oxygen.
An organism that does not require oxygen.
A state in which members of a population die as quickly as new members are born.
Population growth that is unhindered because of the resources for an ever-increasing population.
Population growth that is controlled by limited resources.
A temporary union of two organisms for the purpose of DNA transfer.
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.
The transfer of a DNA segment from a nonfunctional donor cell to that of a functional recipent cell.
The process in which infection by a virus results in DNA being transferred from one bacterium to another.
The DNA and other essential parts of a bacterium coated with several hard layers.
Organisms from the same species that have markedly different traits.