Consider a plant that grows best in bright sunlight in which seed germination is controlled by phytochromes.

Which of the following statements describe(s) the structure and function of phytochromes in this plant? Select all that apply

a. The effects of red and far-red light on phytochromes are irreversible.

b. Phytochromes absorb red light and far-red light equally when the phytochrome is in the Pir configuration.

c. The plant seeds are more likely to germinate after exposure to red light than after exposure to far-red light.

d. Phytochromes contain photoreceptors.

e. When a phytochrome in the Pfr configuration absorbs far-red light, the phytochrome reverts to the Pr configuration.

f. Far-red light stimulates the plant seeds to germinate when the phytochrome is in the Pfr configuration.

g. Phytochromes absorb red light maximally when the phytochrome is in the Pr configuration.

A3-year-old child with nephrotic syndrome has been receiving prednisone for 1 week. the nurse reviews the child's progress record and determines that the medication has been effective. what information supports this conclusion? select all that apply.

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

How does a lytic infection differ from a lysogenic infection?