virus and germes Flashcards
(12 cards)
prokaryote
an organism that consists of a single cell that does not have a nucleus
binary fission
a form of asexual reproduction in a single-celled organism by which one cell divides into town cells of the same size
endospore
a thick-walled protective spore that forms inside a bacterial cell and resists harsh conditions
bioremediation
the biological treatment of hazardous waste by living organisms
antibiotic
medicine used to kill bacteria and other microorganisms
pathogenic bacteria
bacteria that cause disease
virus
a microscopic particle that gets inside a cell and often destroys the cell
host
an organism from which a parasite takes food for shelter
spirilla
a bacterium with a rigid spiral structure, found in stagnant water and sometimes causing disease
bacilli
a rod-shaped bacterium a disease-causing bacterium.
cocci
any spherical or roughly spherical bacterium.
nitrogen fixation
the chemical processes by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle.