Plant Anatomy

The Root: Primary State of Growth

Multiple Choice Quiz


1	Which is not a feature of rhizodermis?
		A)	No intercellular spaces between cells.
		B)	May be trichoblasts.
		C)	May be atrichoblasts.
		D)	Derived from protoderm.
		E)	Possess cuticle on surface.


2	Cells of the columella:
		A)	are derived from procambium.
		B)	are meristematic.
		C)	are adapted for absorption.
		D)	possess statoliths.
		E)	are derived from ground meristem.


3	Dicot roots do not possess:
		A)	cortex.
		B)	rhizodermis.
		C)	pith.
		D)	endodermis.
		E)	pericycle.


4	On which wall(s) is the Casparian strip located?
		A)	Periclinal
		B)	Transverse only
		C)	Tangential only
		D)	Transverse and radial
		E)	Tangential and radial


5	Root primary xylem develops in which manner?
		A)	Exarch
		B)	Endarch
		C)	Centrifugal
		D)	Diffuse
		E)	Outside the secondary xylem


6	Passage cells are found in which tissue?
		A)	Metaxylem
		B)	Rhizodermis
		C)	Endodermis
		D)	Cortex
		E)	Pericycle


7	Exodermis is derived from cells of the:
		A)	rhizodermis.
		B)	cortex.
		C)	endodermis.
		D)	pericycle.
		E)	cambium.


8	Which transition lacks symplastic movement?
		A)	Rhizodermis to cortex
		B)	Cortex to endodermis
		C)	Endodermis to pericycle
		D)	Pericycle to xylem
		E)	Symplastic movement is lacking in all of the above.


9	In dicots, lateral roots typically form from pericycle at sites of:
		A)	starch accumulation.
		B)	protoxylem poles.
		C)	between metaxylem cells.
		D)	phloem.
		E)	passage cells.


10	Apical meristems of most gymnosperms and dicots is:
		A)	open.
		B)	closed.
		C)	lacking.
		D)	derived from calyptrogen.
		E)	organized into defined layers when observed with light microscopy.

2003 McGraw-Hill Higher Education

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