Answer:
C Halobacterium species
Explanation:
ThIs is because this species of bacteria thrive well in high salt concentrations; and will be inactive in a low salt concentration medium.They are known as Hallophilic Organisms. (salt organism)s
They are rod-shaped, motile organisms , which reproduced by binary fission,live in saline lakes, with the cell bounded by a single layer of plasma membranes.They contain beta-caroteen pigments. it is this that is responsible for their red coloration.When this pigment is extracted, is used in food dye. giving food red coloration.
In addition, Halo. Bacteria contain some enzymes that can break dowm organic molecules to simplest forms. These are Degredative enzymes.(e.g Lipase , Amylases). it is this feature that aids their application for aiding the process of fermentatio<u>n of salty foods</u>, and also aiding of <u>coffee processing during production. </u>
<u>Since this is called a salty bacterium, and its enzymes will be most active in high salty concentrations, then option C is the correct answer.</u>
The answers is D because it needs something to survive
Answer:
The correct answer would be (b) All scientific theories are subject to change and improvement.
Explanation:
No theory is considered the absolute truth, although some have been proved and deeply studied, through years many theories that were considered completely true, have become incomplete or false. Therefore, as true and correct a theory sounds, it can still be proved wrong in the future.
Answer:
In gram staining, 95% ethanol is used to destain the gram-negative bacteria but gram-positive bacteria do not get destain because peptidoglycan layer in gram-positive cell wall does not allow crystal violet- iodine complex to come out of the cell wall.
Gram-negative bacteria do not have peptidoglycan cell wall and so crystal violet comes out of the cell wall by using 95% ethanol because ethanol dissolves the lipopolysaccharide membrane of gram-negative bacteria and allow the dye to leak out.
Therefore if I forgot to apply 95% ethanol than crystal violet dye will not come out of the lipopolysaccharide cell wall of gram-negative bacteria and it will appear violet under the microscope.
Now if you are talking about cells then Eukaryotic cells<span> contain membrane-bound organelles, including a nucleus. </span>Eukaryotes<span> can be single-celled or multi-celled, such as you, me, plants, fungi,and insects. Bacteria are an example of </span>prokaryotes<span>. </span>Prokaryotic cells do<span> not contain a nucleus or any other membrane-bound organelle.</span>
