Question

In stems, the protoxylem lies towards the ___________and the metaxylem lies towards the ____________ of the organ.

• A. centre; periphery
• B. periphery; centre
• C. periphery; periphery
• D. centre; centre

Answer 1

The correct option is A centre; periphery

Primary xylem is of two types – protoxylem and metaxylem. The first formed primary xylem is called protoxylem and the later formed primary xylem is called metaxylem. In stems, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the peripheryof the organ. This type of primary xylem is called endarch.