1. In a school of 400 students, with days contagious of 10, if the simulation starts with one infected person, how many school days would it take to infect about half the students?

2. Infected students can spread the virus 14 days before they begin to feel ill. In a school
of 400 students, with days contagious of 14, if the simulation starts with one infected person, how many school days would it take to infect about half the students?

3. What other parameters might slow or speed up the spread of the virus in school?

4. In a small community of 900 people, with days contagious of 14, if the simulation starts
with one infected person, what percentage of the population will eventually become
infected over time? How do you know?

5. Describe how you can change the parameters so that approximately 50% of the
population is eventually infected.

6. How can social distancing help to flatten the curve so that the number of people infected
is less than 20%? What other factors could influence the chance of contracting the
virus?

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 this experiment explain why it is often milder in areas such as coastal maryland while areas such as kansas or iowa have more extremes in temperature

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above