Meristematic cells do not contain plastids as they do not carry out photosynthesis.

Apical meristem is found in the lower/middle parts of the arctic plants. It is thought that this kind of meristem evolved because it is advantageous in arctic conditions.

A kind of vascular bundle in which phloem lies only on one side of xylem, usually towards the stem interior, is found in rose plant. This kind of a vascular bundle is called collateral. Such vascular bundles are found in dicots like rose.

Unifacial cambium is found in Lycophyte trees. Unifacial cambium does not produce phloem to its exterior and is unable to expand its circumference with anticlinal cell division.

The leaves and stems of ferns have mesarch development. Here, there is more than one strand of primary xylem in a stem or root, and the xylem develops from the middle of a strand in both directions.

Caudex is present in Jatropha cathartica. It has a large globose caudex. It is underground in the wild, but becomes exposed if cultivated in a container.

Karl Wilhelm von Nägeli first used the term meristem in 1858 in his book Beiträge zur Wissenschaftlichen Botanik.

Haplostele is prevalent in Rhynia. It consists of a cylindrical core of xylem surrounded by a ring of phloem. It is surrounded by endodermis.

The band of cells located between the endodermis and phloem in plant roots is called pericycle. It regulates the formation of lateral roots by rapidly dividing near the xylem elements of the root.

This is false. Central zone is a small group of fast dividing cells.

Sola pith plant is used for making pith helmets. These helmets are made from the pith of the sola.

Both A and B are correct and B is the correct explanation of A. In plants, aphids are found on the underside of a leaf because phloem is present there, from which the aphids obtain their food.

Rhizobium induces meristem in Lotus japonicus. Lotus japonicus is a leguminous plant and has rhizobium as a symbioant.

Manipulation of floral meristem resulted in tobacco mutant called Maryland Mammoth. It grows much faster than other tobacco plants.

The rate of emergence of leaves from the apical bud is called phyllochron.