Which of the following accurately describes the flow of energy through ecosystems?
a. a third-level consumer would store a greater portion of energy from the previous level than would a second-level consumer.
b. energy is always passed from the consumer to the primary producer.
c. all of the energy found within a primary producer is transferred to a first-level consumer.
d. the percentage of the original energy from producers that's available to the consumer is quite small.

What is histamine and what is its role in allergic reactions

In which specialized organ of the plant would these cells most likely be found

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