Anatomy of Roots — NEET Biology MCQs with Solutions
Free NEET Biology Anatomy of Roots MCQs with step-by-step solutions (6 questions). Part of Anatomy of Flowering Plants. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Anatomy of Roots · easy · theory
The number of xylem bundles ("arches") helps identify roots. A dicot root is typically:
A. Without xylem
B. Tetrarch to hexarch (2–6 xylem bundles) ✓ Correct
C. Polyarch (many)
D. Monarch always
Solution: Dicot roots have limited (2–6) xylem bundles; monocot roots are polyarch (many, often >6).
Q2 — Anatomy of Roots · easy · theory
The innermost layer of the cortex with a Casparian strip, regulating water entry to the stele, is the:
A. Endodermis ✓ Correct
B. Epidermis
C. Pith
D. Pericycle
Solution: The endodermis with Casparian strips controls the radial flow of water into the vascular cylinder.
Q3 — Anatomy of Roots · medium · theory
Lateral roots and, in dicots, the vascular cambium arise from the:
A. Cortex
B. Pericycle ✓ Correct
C. Endodermis
D. Pith
Solution: The pericycle (just inside the endodermis) gives rise to lateral roots and part of the vascular cambium.
Q4 — Anatomy of Roots · medium · theory
A monocot root differs from a dicot root in having:
A. Tetrarch xylem and no pith
B. Xylem in a ring
C. Cambium producing wood
D. Polyarch xylem and a large, well-developed pith; no secondary growth ✓ Correct
Solution: Monocot roots are polyarch with a large pith and (usually) no secondary growth; dicot roots have few xylem bundles and little/no pith.
Q5 — Anatomy of Roots · hard · theory
In a dicot root, the xylem is ______ (protoxylem toward periphery), which is described as:
A. Centrarch
B. Endarch
C. Exarch ✓ Correct
D. Mesarch
Solution: Roots have exarch xylem (protoxylem outer, metaxylem inner); stems have endarch xylem — a key distinction.
Q6 — Anatomy of Roots · hard · theory
Which anatomical feature is COMMON to both dicot and monocot roots?
A. Endarch xylem
B. Vascular cambium producing secondary xylem
C. Conjoint collateral bundles
D. Radial vascular bundles with exarch xylem and an endodermis with Casparian strips ✓ Correct
Solution: Both root types share radial, exarch bundles and a Casparian-stripped endodermis; they differ in xylem number, pith and secondary growth.