Anatomy Of Flowering Plants Question 18
Question: In Cucurbita, stem vascular bundles are:
Options:
A) Radial
B) Collateral
C) Concentric
D) Bicollateral
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Answer:
Correct Answer: D
Solution:
Bicollateral – If the phloem is present on both the peripheral and inner side of xylem tissue, the vascular bundle is known as Bicollateral.
The strip of cambium between the peripheral phloem and xylem is the outer cambium.
The strip of cambium between the inner phloem and xylem is called the inner cambium. Bicollateral vascular bundles are always of open type since cambium is present.
The transverse section of Cucurbita stem shows it to have a wavy margin with distinct ridges and furrows.
The vascular bundles are arranged in two rings – the larger ones in the center and the smaller ones towards the edges.
The vascular bundles are of bicollateral type. Hence, option (d) is correct.
BETA
