Question

Water containing cavities in vascular bundles occurs in

• A. Sunflower
• B. Maize
• C. Pinus
• D. Cycas

Answer 1

Answer: (B)

Maize

1. Sunflower is a dicot stem plant and vascular bundles are collateral conjoint and open type.
2. In monocot like Zea mays (maize) vascular bundles are collateral, conjoint and closed type and the lowermost vessel and xylem parenchyma dissolve to form a water-containing cavity called protoxylem cavity.
   
3. Pinus and Cycas are gymnosperms that lacks xylem vessels.

So the correct option is 'Maize'.