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The annular and spirally thickened conducting elements generally develop in the protoxylem

The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is:

Options

(a) elongating
(b) widening
(c) differentiating
(d) maturing

Correct Answer:

maturing

Explanation:

The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is maturing

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