Plant Anatomy

Phloem parenchyma is absent in monocot stem.

Maximum number of chloroplast in the leaf is found in palisade tissue.

Periblem gives rise to cortex. The cortex is the outermost layer of the stem or root of a plant, bounded on the outside by the epidermis and on the inside by the endodermis.

Vascular bundles in the stem of lagenaria are bicollateral. It is confined to certain dicot stem only.

Centripetal xylem is present in roots.

Bordered pits are commonest in gymnosperm. Gymnosperms are plants of a group that comprises those that have seeds unprotected by an ovary or fruit, including the conifers, cycads, and ginkgo.

The cork tissue is also known as phellem. Phellem is the outer tissue of bark; a protective layer of dead cells.

In dicot stems, cork cambium originates from pericycle.

Occurrence of 2, 3 or 4 redial vascular bundles is a feature of monocot root.

As secondary growth advances, increase in the width of a plant occurs due to increase in heartwood.

The youngest layer of secondary xylem is the nearest to cambium. It is a cellular plant tissue from which phloem, xylem or cork grows by division, resulting (in woody plants) in secondary thickening.

Annual rings are formed due to the activity of cambium.

Lenticel is not present in the leaves.

A vascular bundle having its xylem completely surrounded by phloem is called amphicribal.

In the old and woody stems and roots gaseous exchange occurs through lenticels.