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biology, unit 2
vocabulary
| Question | Answer |
|---|---|
| saprophyte | organism that feeds on dead matter |
| parasite | organism that feeds on a living host |
| aerobic organism | organism that requires oxygen |
| anaerobic organism | organism that doesn't require oxygen |
| steady state | a state in which members of a population die as quickly as new members are born |
| exponential growth | population growth 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 to a bacterium and can be reproduced separately 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 |
| endospore | the DNA and other essential part of a bacterium coated with several hard layers |
| strains | organisms from the same species that have markedly different traits |