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22 terms

Lab questions

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why is it important that bacteria release nutrients?
if nutrients weren't released, eventually it would all be locked up in dead, non-decaying tissue
what term best describes heterotrophic bacteria that feed on living tissue?
parasitism
bacillus megaterium
large, bacillus
rhodospirillum rubrum
medium/small, spirillum
staphylococcus epidermidis
small, coccus
e. coli
medium, bacillus
what was the gram+ control for bacteria?
staphylococcus epidermidis
what was the gram- control for bacteria?
escherichia coli
is bacillus megaterium gram positive or gram negative?
gram positive (stained purple)
bacillus megaterium: form, margin, and elevation
large, wrinkled, and flat
e. coli: form, margin, and elevation
small, smooth, and flat
staphylococcus epidermidis: form, margin, and elevation
small, rounded, and convex
where are the bacteria in a nodule?
inside the cell (pink dots)
what is the relationship between a plant and bacterium called?
a mutualism
how does the bacteria (rhizobium) benefit from the relationship between bacterium and plant?
the bacteria gets sugars and other nutrients from the plant
how does the plant benefit from the relationship between bacterium and plant?
the reduced nitrogen made from the bacteria is fertilizer
what is used to determine the effectiveness of antibiotics?
a sensitivity plate
oscillatoria grows as long chains of cells called
trichomes
where does nitrogen fixing occur in nostoc?
heterocysts
adjacent cells share a common...
sheath
what is the function of a sheath?
protection and to keep the colony together
do clusters of gloeocapsa represent multicellular organisms?
no because you can break down the cells without killing them