Which of the following is an example of passive transport across the cell membrane?
A. the stimulation of a muscle cell
B. the uptake of glucose by the microvilli of cells lining the stomach
C. the movement of insulin across the cell membrane
D. the movement of carbon dioxide across the cell membrane
E. the selective uptake of hormones across the cell membrane

Cedure,© data: rmativetable 1: positive and negative results when imacromoleculeregative results when testing for the presence of macromoleculeschemical test | positive test result negative tcarbohydrates – simplesugarse negizitivecarbohydrates – 2: results for the presence of macromolecules in the evidence sample

Which organism is the producer in this food web? 7th grade question. a) arthropods b) birds c) fungi d) plants

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