Answer:
Correct option is C.
Explanation:
Gram staining is a technique of separation of the bacteria based on the cell wall composition. Steps involved in gram staining are:
1) Primary stain application which is known as crystal voilet, it stains all cells purple/blue.
2) Mordant stain application which is known as iodine solution, is added, and form crystal iodine complex, all cells continue to stain blue/purple.
3) Decoloration step, in this step, we can differentiate gram negative or gram positive bacteria. So, decolorizing agent such as ethanol or acetone extracts blue color from thin walled peptidoglycan layer gram negative bacteria, and gram positive bacteria remain blue/purple because it contains thick walled peptidoglycan layer.
4) Counterstain application in this step safranin red dye stain the gram negative decolorized cells red/pink, and gram positive bacteria remain same blue.
So, if a student is performing a Gram stain of a mixed culture of both E. coli and S. aureus, and he forgets to decolorize with ethanol Both the bacteria should appear blue/purple color.
Answer:
c
Explanation:
An experiment in which an observer tests a hypothesis by looking for changes brought on by alterations to a variable. In a controlled experiment, an independent variable is the only factor that is allowed to be adjusted, with the dependent variable as the factor that the independent variable will affect.
in Basic terms The control group provides a baseline that lets us see if the treatment has an effect.
Answer:
Yes, i would like to live in an urbanism area because i am closer to my friends and family. I like being closer to stores and to my job.
Explanation:
Answer:
<em> </em><em> </em><em> </em><em> </em><em>=</em><em>></em><em>. </em><em>Matter </em><em>is </em><em>anything</em><em> </em><em>that </em><em>occupy</em><em> </em><em>space</em><em> </em>
<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>and </em><em>has </em><em>mass </em><em>is </em><em>called</em><em> </em><em>matter</em>
<em> </em><em> </em><em> </em><em> </em><em>=</em><em>></em><em> </em><em>so,</em><em> </em><em>air </em><em>also </em><em>occupy</em><em> </em><em>space</em><em> </em><em>and</em><em> </em><em>has </em><em>mass </em>
<em> </em><em> </em><em> </em><em> </em><em> </em><em>so,</em><em> </em><em>it </em><em>is </em><em>called </em>
<em> </em><em> </em><em> </em><em> </em><em>=</em><em>></em><em> </em><em>Everything</em><em> </em><em>surround </em><em>us </em><em>to </em><em>which </em><em>can </em><em>touch </em><em>are </em><em>called</em><em> </em><em>matter</em>
<em> </em><em> </em><em> </em><em> </em><em> </em><em>hope</em><em> it</em><em> helps</em>
If a scientist makes the argument that she has found DNA evidence that shows that evolution does not exist, the evidence would be the weak physical similarities among closely related organism and also among distantly related.
