Question

Mesarch xylem occurs in
(a)Monocots
(b)Dicots
(c)Ferns
(d)Bryophytes

Answer 1

Hint: Xylem is a type of transport tissue that transports water from the roots to the other parts of a plant. Mesarch xylem was found in the primitive vascular plants which are also called vascular cryptogams.

Complete answer:
The term mesarch is used when there is more than one strand of primary xylem in a stem or the roots. The xylem develops from the middle of a strand in both directions.
The metaxylem is thus on both the peripheral and the central sides of the strand and the protoxylem is present between the metaxylem or possibly surrounded by it.
Thus, it is a condition in which a primary xylem strand develops in the centre and then continues to develop both centrifugally and centripetally.
This type of xylem development is seen in the leaves and stems of many ferns.

Additional Information: -Xylem is one of the two types of transport tissues present in the plant. Xylem transports water while the phloem transports food.
-This xylem development can be described by four methods, centrarch, exarch, endarch, and mesarch, and as the plant matures its nature changes from protoxylem to metaxylem.
So, the correct answer is, “Ferns”

Note:
 -Pteridophytes were the first vascular plants and ferns belong to this division of plants.
-The production and development of xylem in most pteridophytes is diarch in nature which means the first matured xylem appears along two lines at the outer periphery of the xylem.