Question

which diagram correctly compares the size of a prokaryotic cell with a eukaryotic cell?
a: 100-1,000 μm prokaryotic cell, 10-100 μm eukaryotic cell (two oval shapes);
b: 10-100 μm prokaryotic cell, 10-100 μm eukaryotic cell (two oval shapes);
c: 1-10 μm prokaryotic cell (oval), 10-100 μm eukaryotic cell (small bar);
d: 1-10 μm prokaryotic cell (small bar), 10-100 μm eukaryotic cell (oval).
possible points: 2.13.
options: ○ a, ○ b, ○ c, ○ d

Explanation:

Prokaryotic cells typically range from 1 - 10 μm in size, while eukaryotic cells range from 10 - 100 μm. We analyze each option:

• Option A: Prokaryotic cell size (100 - 1000 μm) is incorrect; prokaryotes are smaller.
• Option B: Both prokaryotic and eukaryotic cells are given the same size range (10 - 100 μm), which is wrong as prokaryotes are smaller.
• Option C: Prokaryotic cell size (1 - 10 μm) and eukaryotic (10 - 100 μm) but the diagram's visual representation (prokaryotic larger than the small bar but eukaryotic is a bar? No, the labels and sizes: Wait, no, the visual: Prokaryotic is 1 - 10, eukaryotic 10 - 100, but the diagram for C has prokaryotic as a larger oval than the small bar, but eukaryotic is a small bar? No, re - check. Wait, the correct size is prokaryotes 1 - 10 μm, eukaryotes 10 - 100 μm. So the diagram should show prokaryotic smaller than eukaryotic. Wait, no: 1 - 10 μm is smaller than 10 - 100 μm? Wait, 1 - 10 is a smaller range (max 10) than 10 - 100 (min 10). Wait, no: Prokaryotic cells are generally smaller, with a size range of 1 - 10 μm, and eukaryotic cells are larger, 10 - 100 μm. So the prokaryotic cell's diagram should be smaller than the eukaryotic. Let's check the options:
• Option D: Prokaryotic is 1 - 10 μm (small bar) and eukaryotic is 10 - 100 μm (large oval), which matches the size relationship (prokaryotic smaller, eukaryotic larger). Wait, no, earlier mistake: Wait, 1 - 10 μm is the size of prokaryotes, 10 - 100 μm for eukaryotes. So the prokaryotic cell should be smaller in the diagram. Let's re - evaluate:
• Option A: Prokaryotic (100 - 1000) is larger than eukaryotic (10 - 100) → wrong.
• Option B: Both same size → wrong.
• Option C: Prokaryotic (1 - 10) is a large oval, eukaryotic (10 - 100) is a small bar → visual size wrong (prokaryotic looks larger) → wrong.
• Option D: Prokaryotic (1 - 10) is a small bar, eukaryotic (10 - 100) is a large oval → visual size matches (prokaryotic smaller, eukaryotic larger) and size ranges are correct.

Answer:

D