Typical size range of plant cell nucleus

Steps:

• Identify that plant cell nuclei measure 5-25 μm in diameter based on standard biology references.
• Note the question asks for length, which aligns with typical nuclear dimensions.
• Eliminate options outside the eukaryotic nucleus size range (usually under 50 μm).
• Select the value within the upper end of the typical range for plant cells.

Why B is correct:

• Plant cell nuclei average 10-25 μm, matching the standard size for eukaryotic nuclei in larger plant cells per cell biology definitions.

Why the others are wrong:

• A: Too small; typical minimum is around 5-10 μm, but 8 μm underestimates for many plant nuclei.
• C: Too large; exceeds the maximum observed nucleus size in plant cells.
• D: Excessively large at 800 μm, comparable to entire small cells, not organelles.

Final answer: B