Scientists can measure gene expression in firefly genes using plants. To measure the gene expression, the firefly gene must be attached to the plant
gene that scientists want to study. Then, when the plant gene is
actively expressing itself, such as when a new leaf forms, the firefly gene
simply lights up. The light can be detected and measured by a number of
devices. How is it possible that plants can express firefly genes?

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 best explains the inability for life to exist in earth early atmosphere

Me with biology endocrine system crossword also image left i need with hw