Question

A common structural feature of vessel elements and sieve tube elements is

• A. Enucleate condition
• B. Thick secondary walls
• C. Pores on lateral walls
• D. Presence of P-protein

Answer 1

The correct option is A Enucleate condition

Cells forming the vessels are heavily ligniifed, dead, that is with no protoplasm and nucleus, forming a continuous lacuna by dissolution of the separating walls.

The cells forming the seive tube are arranged in vertical columns, are not lignified, are living with protoplasm but no nucleus and are connected to each other through partial dissolution of the contact walls forming seive plates.

So, the correct answer is 'Enucleate condition'