Biology, 12.09.2021 06:00 Badbpyz7987
The Greek roots of the word prokaryote mean “before nucleus.” Describe the way that DNA is
organized in prokaryotic cells without the help of a nucleus. How does this approach differ from the way
that eukaryotic cells organize their
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Biology, 21.06.2019 16:00
Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right
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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
Answers: 1
Biology, 22.06.2019 01:20
Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen
Answers: 2
The Greek roots of the word prokaryote mean “before nucleus.” Describe the way that DNA is
organiz...
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