 | Term | Definition |
| |
shape, chemical nature of cell wall, & movement |
two distinguishing characteristics of prokaryotes |
| |
rods, spheres & sprials |
three main cell shapes of prokaryotes |
| |
gram positive have thick peptidoglycan walls retaining the dye whereas gram negative have thinner walls inside an outer lipid layer allowing the dye to leach out |
distinguish between gram positve & gram negative |
| |
flagella and gliding along a layer of slimelike material they have secreted |
two methods by which prokaryotes move |
| |
aerobes require a constant supply of oxygen whereas anaerobes must live in the absence of oxygen |
difference between obligate aerobe and obligate anaerobe |
| |
facultative anaerobes |
what group of bacteria can survive with or without oxygen |
| |
because they can switch between the processes of cellular respiration and fermentation |
how can facultative anaerobes survive with or without oxygen |
| |
they are nitrogen fixers |
what role do certain bacteria play in changing atmospheric nitrogen into a form usable by plants |
| |
they enter living cells and once inside use machinery of the infected cell to produce more viruses |
one characteristic viruses have in common |
| |
vaccinations |
the best way to protect humans against most viral diseases |
