Which is an example of science playing a role in developing technology? the use of an electric spark to produce amino acids from gases that are present in Earth’s early atmosphere the discovery that Penicillium mold produces a substance that prevents bacterial growth the improvement in lens-grinding technology, which led to the discovery of cells in cork the discovery that microwaves can pop corn, which led to the creation of microwave ovens

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

What is used to keep track of the gamates and possible offsprings combination

Which term describes a normal value for something in the body? a.homeostasis b.set point c.feedback loop d.integration center