In a ring girdled plant, roots die first due to damage of phloem causing inhibition of translocation of food.

Correct Option: A

In a ring girdled plant, roots die first due to damage of phloem causing inhibition of translocation of food.

The walls of vessels (tracheary elements) are lignified and less thicker than tracheids. The lumen is wider. Vessels differ from tracheids in having cell fusions arising through the dissolution of end walls.

Correct Option: B

The walls of vessels (tracheary elements) are lignified and less thicker than tracheids. The lumen is wider. Vessels differ from tracheids in having cell fusions arising through the dissolution of end walls.

Tracheids are chief water conducting elements of xylem in gymnosperms. They are devoid of protoplasm and hence dead. The wall constituting the tracheids is hard, thick and lignified. These are elongated cells with tapering ends.

Correct Option: D

Tracheids are chief water conducting elements of xylem in gymnosperms. They are devoid of protoplasm and hence dead. The wall constituting the tracheids is hard, thick and lignified. These are elongated cells with tapering ends.

Apical meristem is located at the apex of stem, root and branches, and forms axillary and terminal bud. Intercalary meristems take part in linear growth. Lateral meristem occurs parallel to the circumference of the organs. They increase the girth of the plant.

Correct Option: C

Apical meristem is located at the apex of stem, root and branches, and forms axillary and terminal bud. Intercalary meristems take part in linear growth. Lateral meristem occurs parallel to the circumference of the organs. They increase the girth of the plant.

The walls of xylem vessels are lignified and bordered pits are common in the walls

Correct Option: B

The walls of xylem vessels are lignified and bordered pits are common in the walls