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biology terms mod. 2
| Term | Definition |
|---|---|
| Pathogen | An organism that causes disease. |
| Saprophyte | An organism that feeds on dead matter. |
| Parasite | An organism that feeds on a living host. |
| Aerobic organism | An organism that requires oxygen. |
| Anaerobic organism | An organism that does not require oxygen. |
| Steady state | A state in which members of a population die as quickly as new members are born. |
| Exponential growth | Population that is unhindered because of the abundance of resources for an ever-increasing population. |
| Logistic growth | Population growth that is controlled by limited resources. |
| Conjugation | A temporary union of two organisms for the purpose of DNA transfer. |
| Plasmid | A small circular section of extra DNA that confers one or more traits of a bacterium and can be reproduced seperately from the main bacterial genetic code. |
| Transformation | The transfer of a DNA segment from a nonfunctional donor cell to that of a functional recipient cell. |
| Transduction | The process in which infection by a virus results in DNA being transferred from one bacterium to another. |
| Strains | organisms from the same species that have markedly different traits. |