Root Stem

Question 1

in a developing root, most of the length-extension occurs in the ___.

Answer 1

Elongation zone

Question 2

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___.

Answer 2

pericycle

Question 3

The parenchymous ‘pith’ in the center of most monocot roots is derived from the ___

Answer 3

Procambium

Question 4

The pneumataphores or ‘air-roots’ of certain mangrove trees (found in coastal salt-wetlands) function to

Answer 4

provide oxygen to the roots which grow in anoxic, waterlogged, salty soil.

Question 5

The bulges that form just below the stem apical mersistem that will develop into leaves are called ____.

Answer 5

leaf primordia

Question 6

Eudicots and conifer-gymnosperms have vascular tissue that is arranged

Answer 6

in a ring of widely-spaced to nearly continuous vascular bundles surrounding a central pith.

Question 7

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

Answer 7

the interior

Question 8

The vascular bundles of monocots including corn & other grasses, are ___.

Answer 8

scattered in a random-appearing fashion throughout the cross-section of the stem.