Question

Pick out the feature not applicable to roots. (a) Radial arrangement of vascular tissues (b) Endarch xylem (c) Meta xylem is polygonal in shape (d) Endogenous lateral roots

Answer 1

$\to$ (b) Endarch xylem ------- answer

b, is incorrect about roots.

Reason:

• In roots radial arrangement of vascular tissues are found.
• protoxylem is towards outside(facing pericycle), metaxylem is towards inside(facing pith). This causes the exarch(outside to inside) development of xylem in roots.
• Metaxylem are polyhedral shape in dicots while polygonal in monocots.
• pericycle gives the endogenous origin of lateral roots.

★Note: Endarch development of xylem is found in stems and leaves.

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Answer 2

Explanation:

$\to$ (b) Endarch xylem ------- answer

b, is incorrect about roots.

Reason:

In roots radial arrangement of vascular tissues are found.

protoxylem is towards outside(facing pericycle), metaxylem is towards inside(facing pith). This causes the exarch(outside to inside) development of xylem in roots.

Metaxylem are polyhedral shape in dicots while polygonal in monocots.

pericycle gives the endogenous origin of lateral roots.

★Note: Endarch development of xylem is found in stems and leaves.

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