Anatomy of Flowering Plants Test - 5

Reticulate venation: In this type, the veins branch and unite forming a complicated network, All the veins are interconnected, like the strands of the net. Leaves of ‘Dicot plants’ generally have reticulate venation e.g., Hibiscus, Redgram

The roots of extant vascular cryptogams and most monocotyledons do not show any secondary growth; they remain entirely primary throughout their life.

In isobilateral leaves of monocot, certain adaxial epidermal cells along the veins modify themselves into large, empty, colourless cells. These are called bulliform cells.

The stem shows the epidermis covered with a thin layer of cuticle, narrow cuticle and each vascular bundle is conjoint, open and is endarch protoxylem.

Grasses belongs to monocotyledonous angiosperms in which secondary growth do not occurs. Plants elongate by the activity of both apical and intercalary meristem.

Separate xylem and phloem bundles are found in dicotyledonous roots. This kind of vascular bundle is called radial vascular bundle.

Quiescent centre is a small group of cells with low mitotic activity. It is found at the tips of growing roots in the root meristem.

The ground tissue of plants includes all tissues that are neither dermal nor vascular. It can be divided into three classes based on the nature of the cell walls.

Lucinate collenchyma is very much alike to angular collenchyma but the cells are regularly arranged. Thickening occurs at theinner and outer tangential wall. It is found in cucurbita stem.