Match the need with the professional who best fits it. 1. A drilling company wants to expand its water operations, but it needs to seal different gear fittings using something eco-friendly.

2. After a strong hurricane, areas were heavily flooded for a week. The governor would like to make sure that the receding waters are not polluting water supplies.

3. A film production crew is hired to promote safe and environmentally friendly wetland use and increased interest in these efforts. The crew needs an expert to write the storyline.

wetland ecologist
environmental technician
oceanographer

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

Environmental science are unconsidered with methods to preserve natural resourcesa. trueb. false

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic