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biology vocab 2
| Term | Definition |
|---|---|
| chitin | polymer made of modified sugars that is also found in the exoskeleton of insects |
| hypha | One of many long, slender filaments that makes up the body of a fungus |
| fruiting body | reproductive structure of a fungus that grows from the mycelium |
| mycelium | densely branched network of the hyphae of a fungus |
| lichen | symbiotic association between a fungus and a photosynthetic organism |
| mycorrhiza | symbiotic association of plant roots and fungi |
| virus | nonliving particle made of proteins, nucleic acids, and sometimes lipids that can replicate only by infecting living cells |
| capsid | protein coat surrounding a virus |
| bacteriophage | kind of virus that infects bacteria |
| lytic infection | type of infection in which a virus enters a cell, makes copies of itself, and causes the cell to burst |
| lysogenic infection | type of infection in which a virus embeds its DNA into the DNA of the host cell and is replicated along with the |
| prophage | bacteriophage DNA that is embedded in the bacterial hosts DNA |
| retrovirus | RNA virus that contains RNA as its genetic info |
| prokaryote | unicellular organism that lacks a nucleus |
| bacillus | rod shaped prokaryote |
| coccus | spherical prokaryote |
| spirillum | spiral or corkscrew shaped prokaryote |
| binary fission | type of asexual reproduction in which an organism replicates its DNA and divides in half, producing two identical daughter cells |
| endospore | structure produced by prokaryotes in unfavorable conditions; a thick internal wall that encloses DNA and a portion of the cytoplasm |
| conjugation | process in which paramecia and some prokaryotes exchange genetic info |
| pathogen | disease-causing agent |
| vaccine | preparation of weakened or killed pathogens used to produce immunity to a disease |
| antibiotic | group of drugs used to block the growth and reproduction of bacterial pathogens |
| emerging disease | disease that appears in the population for the first time, or a well known disease that suddenly becomes harder to control |
| prion | protein particles that cause disease |