In the first formed primary xylem,the seconda | vedclass

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Question

(B) The first formed primary xylem is known as protoxylem.In protoxylem,the secondary wall thickenings are generally simple to allow for the elongatio

Vedclass · Accepted Answer

Annular or helical type

Vedclass · Answer

(B) The first formed primary xylem is known as protoxylem.In protoxylem,the secondary wall thickenings are generally simple to allow for the elongation of the organ as it grows.These thickenings are typically of the $Annular$ (ring-like) or $Helical$ (spiral) type.In contrast,the later formed primary xylem,known as metaxylem,typically exhibits more complex thickenings like $Scalariform$,$Reticulate$,or $Pitted$ types.

In the first formed primary xylem,the secondary wall thickening may be of

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Tracheids

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