Question

Xylem vessels are absent in______________
a) Dicotyledons
b) Monocotyledons
c) Gymnosperms
d) Angiosperms

Answer 1

Hint: The xylem is the vascular tissue that is responsible for water conductivity and root supplements. The xylem vessel is one of the tracheary components' two cell types, the other being the tracheid. Both components are the water in vascular plants.

Complete answer:
A vessel is a type of cell that, along with the tracheids, makes up the xylem and is responsible for transporting water and minerals in plants. The water directing xylem cells in angiosperm are vessels or vessel components, but are still lacking in many gymnosperms. Softwood refers to forested areas of gymnosperms that lack vessels in wood filaments and are non-permeable, as found in conifers.
The vessel component can be found in the flowering plants. The vessel component plays an important role in the development of the flowering plants because they require more water. Vessel components are the primary structure vessels that form a critical piece of the water shipping or transporting framework in the plants where they occur.
A vessel component or vessel part is a type of cell found in xylem, the plant's water-leading tissue.
Vessel components are common in blooming plants (angiosperms), but are absent in most gymnosperms, including conifers. The primary element distinguishing angiosperm "hardwood" from conifer "softwood" is vessel components.

Hence, option C- Gymnosperms is the correct answer.

Note:
Each vessel is a non-living xylem segment composed of a cylinder-like arrangement of cells masterminded from start to finish with their interceding dividers missing due to disintegration. Every vessel ranges in length from about 2-8 metres and is made up of smaller components known as vessel sections. These components are used from beginning to end to shape cylindrical channels. When compared to the lumen of tracheids, vessels have a larger lumen.