Why are antibiotics effective in curing diseases against some pathogens but not others?

I. Antibiotics interrupt processes found in some but not all pathogen cells.
II. Some pathogens have no metabolic processes to interrupt.
III. Some pathogens have developed genetic resistance to specific antibiotics.

The correct answer is "I, II, and III".

Explanation:

The missing options of this question are:

I only

II only

III only

I, II, and III

The correct answer is "I, II, and III".

Antibiotics are of different spectrums of activity depending on the number of pathogens they can kill. They are different reasons for this differences in antibiotic specificity:

I. Antibiotics interrupt processes found in some but not all pathogen cells. For instance, some antibiotics are directed to cell walls that not all bacteria posses.

II. Some pathogens have no metabolic processes to interrupt. The antibiotics that are directed to metabolic reactions of bacteria are not effective in treating viruses because they do not perform this metabolic reactions.

III. Some pathogens have developed genetic resistance to specific antibiotics. Bacteria have a remarkable genetic plasticity having plasmids that can be easily transmitted among them, which give them antibiotic resistance.

Yes

Explanation:

The killer whales eat large fish. The large fish eat smaller fish and shrimp. Lastly, the smaller fish and shrimp eat the algae-eating krill. When the sea ice melts, there is less food for the krill. There is less krill for other fish to eat. Lastly, since there is less krill, there will be less killer whales because there isn't enough food.