Part A: Dump the sand along one side of the pan and form a shoreline, as shown in the image. Fill the pan with room temperature water so there’s at least one inch of water in the pan and the top of the shoreline is above the water. If you are using food coloring, add a few drops to your oil and mix thoroughly. Pour the oil in the middle of the ocean you created, and write down what you observe. Part B: Dip both bird feathers in the oil, completely immersing them. Record how the appearance and weight of the feathers change because of the oil. Also, predict what will happen when you try to clean off the feathers by dipping them in hot or cold water.
Part C: Dip one feather in hot water and the other in cold water. Swirl both feathers around for 20 seconds and remove them. Write down any changes you see in the amount of oil on the feathers.
Part D:To simulate ocean waves, start gently pushing the water to the shore using a spatula. Record how the oil moves in the water and what happens to the shoreline.

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

What are the result of when individual components in an organism interact with others to create noval stucture and function called

What is the process of a new plant growing from its seed into a seedling? primary growth fertilization pollination germination