Sagot :
Answer:
The palm has adventitious roots continually produced from the basal 40 cm or so of the trunk, which is the swollen part or what is termed 'bole', in tall types and in some dwarf hybrids. It has no taproot or root hairs but has lots of primary roots which bear large quantities of rootlets.
The main roots grow out somewhat horizontally from the bole and are mostly found within the topsoil. The main branches grow deeper and may extend laterally to as much as 10 m.
The roots, having no cambium, are noticeably uniform - the main roots reaching a maximum diameter of about 1 cm. The root tip is the actively growing region and behind it is the absorbing area whose epidermis is a single layer of thin-walled cells that gradually thicken and become impervious with age. In old roots, the epidermis disintegrates and exposes the hard hypodermis which is generally red.
The root centre has a stele surrounded by a single-celled pericycle sheath from which rootlets and aerenchymatous (respiratory exchange) protuberances or pneumatophores arise. The respiratory exchange occurs more abundantly nearer the soil surface to allow easy diffusion of oxygen into and carbon dioxide out of the root.
Explanation:
N.M