Biology, 14.07.2019 12:30 kenzietaylre
Smart growth is a new trend in urban planning that a. uses all natural materials to build structuresb. uses alternative energy resourcesc. sets growth boundaries around cities and preserve open spacesd. encourages the building of new structures rather than renovating old structures
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Biology, 21.06.2019 16:30
Which organism is the producer in this food web? 7th grade question. a) arthropods b) birds c) fungi d) plants
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Biology, 21.06.2019 20:00
You have been asked to lead a demonstration for the undergraduate microbiology lab course about the uses of negative staining when studying bacteria. a "negative" stain does not stain the bacterial cell itself but stains the space between cells. under magnification, the acidic (negativelycharged) nature of the stain will be repelled by the negatively charged bacterial cell wall and willleave the cell colorless in a stained background. negative stains are used primarily to reveal the presence of negatively charged bacterial capsules; therefore, they are also called capsule stains. encapsulated cells appear to have a halo surrounding them. the negative stain procedure does not require heat fixation, which limits any chances of alteration in bacterial cell shape and size. the bacterial suspension is added to a drop of stain, such as nigrosin or eosin, and drawn across the glass slide using a coverslip.nigrosin staining-not safranin staining-of klebsiella pneumoniae will allow for the visualization of the cell shape and the determination of the presence of a capsule.true/false
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Biology, 22.06.2019 07:00
The distant ancestors of tigers may have had bodies without stripes. use the theory of natural selection to explain how tigers may have evolved to have stripes.
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Smart growth is a new trend in urban planning that a. uses all natural materials to build structures...
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