A biology student views several different prokaryotic and eukaryotic cells under a microscope. How do the prokaryotic cells appear different from the eukaryotic cells?
A
Eukaryotic cells have ribosomes and prokaryotic cells do not.
B
The prokaryotic cells are smaller than the eukaryotic cells.
C
The prokaryotic cells have mitochondria.
D
The eukaryotic cells have cytosol.

B. The prokaryotic cells are smaller than the eukaryotic cells.

Explanation: Its just the simple process of elimination. Prokaryotic cells lack of a lot of things, including mitochondria, so it couldn't be option C. BOTH prokaryotic and eukaryotic cells have cytosol AND ribosomes, so the answer couldn't be D or A, and you're left with option B. Meaning option B is the correct choice.