Question

Pericycle that gives rise to lateral roots is made of.
(A) Meristematic cells
(B) Parenchyma cells
(С) Collenchyma cells
(D) Lateral meristem

Answer 1

Hint: Endodermis is the innermost layer of cortex which comprises a single layer of barrel shaped cell without any intercellular spaces . It bears casparian strips . Below the endodermis pericycle occurs in dicot roots . This pericycle gives rise to lateral roots. It encircles the vascular tissues of roots and stems.

Complete answer:
Pericycle is usually a primary tissue and helps in the formation of lateral roots. It helps in the storage and secretion in the roots . It maintains meristematic activity. It gives rise to vascular cambium and cork cambium. As it is involved in secretion and storage which is the function of parenchyma
Now let us match these functions with given options.
Meristematic cells :- these cells are involved in the active cell division to make new cells . Pericycles do not perform this function so are not made up of these cells .Hence this option is not correct.
Parenchyma cells :- these cells are involved in secretion and storage . Pericycle performs these functions hence are made up of these cells. Thus this option is correct.
Collenchyma cells :- they provide support to growing stem and leaves and pericycle do not do this. Hence are not made up of these kinds of cells. hence this option is not correct.
Lateral meristem :- they help in the regeneration of parts that are lost by grazing herbivores in grasses but Pericycle do not perform this function so are not made up of these cells .Hence this option is not correct.

Our required answer is b that is parenchyma cells.
 

Note: Vascular bundles are radial and exarch. Vascular cambium develops from cells of conjunctive parenchyma and also from cells of pericycle after their dedifferentiation. The formed vascular cambium cuts off secondary xylem towards the centre and secondary phloem away from the centre, thus increasing thickness of the root.