Question

Fusiform initials produce
A.Vascular rays
B.Primary phloem
C.Tracheary elements
D.Ray parenchyma

Answer 1

Vascular cambium forms xylem and phloem and has two kinds of cells, ray initials, and fusiform initials. Initial cells are found in the meristematic area and form more and more cells.

Complete answer: Vascular cambium divides by both anticlinal and periclinal divisions. Anticlinal division which is at right angles to the surface, increases the circumference of the vascular cambium, and periclinal division which is parallel to the surface, produces xylem, phloem, and vascular rays.
Vascular cambium has two kinds of cells, ray initials, and fusiform initials. Ray initials form vascular rays for radial conduction. Fusiform initials form secondary phloem on the outer side and secondary xylem on the inner side.
The cambium is commonly more dynamic on the internal side than on the external side. As a result, the measure of secondary xylem formed is more than secondary phloem.
As tracheary elements are part of secondary xylem so, the correct answer is option C. Tracheary elements.

Note: The primary and secondary phloem get bit by bit squashed because of the development and gathering of secondary xylem. The primary xylem, however, remains pretty much intact, in or around the center.
In the wood, the youngest secondary xylem lies inner to the vascular cambium and the oldest secondary xylem lies outside the primary xylem. The youngest secondary phloem lies outside the vascular cambium. At some places, the cambium forms a narrow band of parenchyma, which passes through the secondary xylem and the secondary phloem in the radial directions. These are the secondary medullary rays.