One of your lab partners has followed the recommended procedure of running gram-positive and gram-negative control organisms on her gram stain of unknown species. her choices of controls were e. coli and b. subtilis. she tries several times and each time concludes she is decolorizing too long because both controls have pink cells (one more than the other). what might you suggest she try and why?

The correct answer is "I would suggest her to change the Gram positive control from Bacillus subtilis to other bacteria".

Explanation:

Bacillus subtilis, and the species from the genre Bacillus, are known for losing the crystal violet coloration during Gram testing. It is likely that B. subtilis might look pink under the procedure for this reason. I would suggest to change her Gram positive control from B. subtilis to other bacteria. For instance, she could try with Staphylococcus aureus, a widely used bacteria as Gram positive control.

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: