The bacterium Staphylococcus aureus is commonly found in the nasal cavity of healthy people. If inhaled into the lungs, however,
it may cause pneumonia. Staphylococcus aureus is best described as___________ 1) transient microbiota.
2) a parasite.
3) a mutualist symbiotic partner.
4) resident microbiota.
5) both resident microbiota and opportunistic pathogen.
The correct answer is option 5) "both resident microbiota and opportunistic pathogen".
Explanation:
Resident microbiota are considered all the bacteria that is within the human body of healthy people. Since Staphylococcus aureus is found at the nasal cavity of healthy people is considered part of the resident microbiota. Staphylococcus aureus is also an opportunistic pathogen, because it takes advantage of an unusual opportunity to infect. This opportunity could be to be inhaled into the lungs, or that its host gets immunologically repressed.
I'd say that it is incorrect because each carbon atom should bond 4 times and all three carbon atoms in this structural formula only bond once. The reverse is true for hydrogen atoms. They only form one bond but in this structural formula two of them have four bonds. I don't know about nitrogen though.
If you're a carrier, you're a heterozygote...So let's say S is normal allele and s is diseased allele, then you'd be Ss. Someone with sickle cell anemia would be ss (homozygous recessive)
