Question

Vascular bundle is known as .........., when the xylem completely surrounds phloem.

• A. Bicollateral
• B. Amphivasal
• C. Conjoint and open
• D. Amphicribral

Answer 1

The correct option is B Amphivasal

In amphivasal or leptocentric vascular bundle xylem is seen towards outside that surrounds the phloem from all sides. Such bundles are seen in monocot plant after secondary growth. In bicollateral vascular bundle, the phloem occurs on either side of the xylem. In conjoint vascular bundle, xylem and phloem on same radii. Amphicribal or hydrocentric vascular bundle has phloem seen towards the outer side and xylem towards the inner side.

Thus, option B is correct.