Nuclei from almost any source may be injected into xenopus oocytes. studies have shown that these nuclei remain active in transcription and translation.

part a

how can such an experimental system be useful in developmental genetic studies?

check all that apply.

a. this system is used to study transcriptional enhancers and suppressors.

b. this system is used to study nuclear-nuclear interactions.

c. this system is used to study intercellular interactions during fetal development.

d. this system is used to study translational and post-translational processes.

e. this system is used to study the effects of mutagens on the development of germ-line cultures.

f. this system is used to study maternal effect.

Which process is involved in growing crops? irrigation transportation recreation condensation

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

2. which is the last step in the scientific method?