Monocot vs. dicot roots: Identify the feature that distinguishes monocot roots from dicot roots. Full question: Monocot root differs from dicot root in having which of the following anatomical features? Choose the correct option.

Concept
Monocot roots are typically polyarch with a large, well-developed pith and lack secondary growth (no functional vascular cambium). Dicot roots often have fewer xylem arms, little to no central pith, and can show secondary growth.

Option analysis
(A) Correct: prominent pith in monocot roots.(B) Incorrect: secondary growth is characteristic of many dicot roots, not monocots.(C) Incorrect description of dicots, not monocots (monocots → many xylem strands).(D) Incorrect: roots have a defined stele.(E) Incorrect: roots show exarch, not endarch, xylem maturation.

Final Answer
A large, well-developed central pith.