Biology, 20.04.2021 06:00, BlueWaaaazzzBerry
Annie Jump Cannon observed that there was variation in the color patterns
between the atomic spectra of different stars. She used these variations
to determine which elements were present in each star. What type of
electromagnetic radiation produced the spectra she analyzed?
F. visible
G. infrared
H. microwave
1.
ultraviolet
Answers: 3
Biology, 21.06.2019 17:50, alishakira690
Aeukaryotic cell must be from a plant if the cell a) a nucleus b) a nuclear envelope c) cytoplasm d) a cell wall
Answers: 1
Biology, 21.06.2019 20:00, skylex
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
Answers: 1
Biology, 22.06.2019 04:30, mildredelizam
Study this image which statement best describes the rock shown check all that apply
Answers: 3
Annie Jump Cannon observed that there was variation in the color patterns
between the atomic spect...
History, 14.06.2020 23:57
Mathematics, 14.06.2020 23:57