CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

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


  1. Thick secondary walls

  2. Pores on the lateral wall

  3. Presence of p-protein

  4. Enucleate condition


Solution

The correct option is B

Pores on the lateral wall


Vessels are one of the four elements that constitute xylem, whereas sieve tube is an element of phloem.
The walls of both vessels and sieve tube elements are perforated by large openings or pores on lateral walls. These pores facilitate the transport of materials.
Unlike the water-conducting xylem vessel elements that are dead, sieve elements are living cells. They lose their nucleus on maturity and attain the enucleate condition.
The walls of xylem vessels undergo secondary thickening at maturity and have hence had thick secondary walls, unlike those of the sieve-tube elements.
P-proteins are structural proteins present in phloem but not in xylem.

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More



footer-image