Question

Bordered pits are found in
(a) Gymnosperms
(b) Bryophytes
(c) Monocots
(d) None of the above

Answer 1

Hint: Bordered pits are cavities or pits in the lignified cell walls of xylem vessels and for the water-transport system of higher plants. 

Complete answer: Pits are thinner portions of the cell wall that adjacent cells can communicate or exchange fluid through. Pits are a characteristic feature of cell walls with secondary layers. These complementary pits are called "pit pairs". Minute openings or pits in the secondary cell wall of water-conducting elements play an important role in water transport in living plants.
They allow the flow of water and nutrients from one element to another, linking water uptake in roots with transpiration in leaves. Usually, two types of pits are present plants; simple pits and bordered pits. Two bordered pits make up a bordered pit pair and two simple pits form a simple pit pair.
Bordered pits are the complex and more variable types of pits in which the secondary wall arches over the pit cavity, the pit cavity is large, and the pit aperture is small. They are abundant in the tracheary elements of many angiosperms and also in the fiber tracheids of many conifers. In them, the secondary wall arches over the pit cavity to form a border around the pit aperture.
In tracheids, they serve as valves to control the flow of water through the cell. In the bordered pits of some dicots, the pit wall gives out some outgrowths into the pit cavity.
So, the correct answer is ‘gymnosperms’.

Note: Tracheary elements are cells in the xylem that are highly specialized for transporting water and solutes up the plant.