Root Stem Flashcards
in a developing root, most of the length-extension occurs in the ___.
Elongation zone
The outermost layer of the vascular cylinder in the center of roots, which is capable of organizing a new meristem to form a branch, is called___.
pericycle
The parenchymous ‘pith’ in the center of most monocot roots is derived from the ___
Procambium
The pneumataphores or ‘air-roots’ of certain mangrove trees (found in coastal salt-wetlands) function to
provide oxygen to the roots which grow in anoxic, waterlogged, salty soil.
The bulges that form just below the stem apical mersistem that will develop into leaves are called ____.
leaf primordia
Eudicots and conifer-gymnosperms have vascular tissue that is arranged
in a ring of widely-spaced to nearly continuous vascular bundles surrounding a central pith.
In most conifer and flowering plant stems (including all the examples I showed you in the notes) the xylem within the vascular tissue occurs toward ___________ of the stem
the interior
The vascular bundles of monocots including corn & other grasses, are ___.
scattered in a random-appearing fashion throughout the cross-section of the stem.