Root Stem Flashcards

1
Q

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

A

Elongation zone

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2
Q

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___.

A

pericycle

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3
Q

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

A

Procambium

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4
Q

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

A

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

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5
Q

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

A

leaf primordia

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6
Q

Eudicots and conifer-gymnosperms have vascular tissue that is arranged

A

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

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7
Q

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

A

the interior

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8
Q

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

A

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

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