Question

although both prokaryotes and eukaryotes contain organelles, to date researchers have not found any in common. for example, magnetosomes and acidocalcisomes are organelles that have only been found in bacteria. the 20+ types of organelles that have been studied and named in eukaryotes are unique to eukaryotes.
in general, the diversity and number of organelles in an average eukaryotic cell is much greater than the diversity and number of organelles in an average bacterium. the first examples of any organelles at all in archaea are just being discovered.
but perhaps the most significant of all generalizations about prokaryotic and eukaryotic cell structure is simple. although there are some extremely small eukaryotic cells and a few extremely large bacterial cells, the average eukaryotic cell is many times bigger than the average prokaryotic cell. how can eukaryotic cells be so large and still function efficiently? and why is large or small size advantageous in different contexts? these are interesting questions, but analyzing them will need to wait for now.
in terms of volume, the average eukaryotic cell is 15,000 times larger than the average prokaryotic cell. how many average - sized prokaryotic cells could fit inside a single average - sized eukaryotic cell?
its not possible to answer this question based on the information provided, because it depends on the width and height of the average cells, not their volumes.
1500
15,000
150,000
a generalization about prokaryotes and eukaryotes like \the structure of each of these shared cell components is unique to each lineage\ can be important in everyday life. as an example, some antibiotics work by inhibiting bacterial ribosomes. this stops protein production in the bacterial cell, killing it. how does this example relate to the \same but different\ generalization about ribosome structure in eukaryotes and bacteria?
in eukaryotes, ribosomes do not function as protein - production centers, so they are not essential to the health of eukaryotic cells.
eukaryotes have ribosomes too, but their structure is different enough that the antibiotic doesnt bind to them and kill eukaryotic cells as well bacterial cells.
the antibiotic does, in fact, bind to eukaryotic ribosomes and kill eukaryotic cells. this is why taking antibiotics causes side effects.

Explanation:

For the first question, since the volume of the average eukaryotic cell is 15,000 times larger than the average prokaryotic cell, the number of average - sized prokaryotic cells that can fit inside a single average - sized eukaryotic cell is based on volume comparison. If \(V_{eukaryotic}=15000\times V_{prokaryotic}\), then the number of prokaryotic cells \(n=\frac{V_{eukaryotic}}{V_{prokaryotic}} = 15000\).

For the second question, the key is the "same but different" concept. Eukaryotes and bacteria both have ribosomes (same), but their structures are different (different). Antibiotics target bacterial ribosomes. If eukaryotic ribosomes were the same as bacterial ribosomes, antibiotics would harm eukaryotic cells. But since they are different, antibiotics can inhibit bacterial ribosomes without (significantly) affecting eukaryotic ribosomes.

Answer:

First question: C. 15,000
Second question: Eukaryotes have ribosomes too, but their structure is different enough that the antibiotic doesn't bind to them and kill eukaryotic cells as well bacterial cells.