Q. The first formed primary xylem elements are called _.

A
Metaxylem
B
Protoxylem
C
Xylem fibres
D
Xylem parenchyma
Solution:

As a young vascular plant grows, one or more strands of primary xylem form in its stems and roots. The first xylem to develop is called ‘protoxylem’. In appearance protoxylem is usually distinguished by narrower vessels formed of smaller cells.

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