Answer: Mucus traps pathogens and destroys them before they can enter the body.
Explanation:
Mucus is a thick viscous liquid secreted by the mucous membranes typically present in the salivary and nasal glands. The mucous secreted by these glands capture the entering disease causing pathogens inside the body. The minute single celled pathogens get stick to the viscous mucous. The mucous destroys these pathogens and prevents the cause of disease.
<span>3)Add iodine (1 min)
4)acid/alcohol wash (1 min)
5)Flood with safranine (1min)
6)Air dry and examine.
These times are for clinical microbiology and experimental methods employ optimal and more precise times (but overall its pretty close).
Down side of this method is that you must smear bacteria onto the slide and fix it by heating the underside of the slide with a bunsen burner. if they are pink then you have gram negative (Gram's stain didnt stick) if its purple then its gram positive(Gram's stain did stick) This is due to the peptidoglycan layers. Gram negative bacteria have only a thin layer of peptidoglycan as part of the cell membrane/wall where Gram positive have a very think peptidoglycan layer.</span>Source(s):<span>Medical Microbiology</span>
Answer:
c
Explanation:
selection helps organisms adapt and c makes the most sense
5 is a nucleotide 6 is RNA