Chapter Quiz


1	Monocotyledonous plants generally have taproot systems with one or more primary and secondary roots.
		A)	True
		B)	False


2	The root hair zone develops in the region of elongation.
		A)	True
		B)	False


3	The enlarged root of the manroot plant is specifically adapted for the storage of starch and other carbohydrates.
		A)	True
		B)	False


4	Lily bulbs are pulled deep into the soil by the action of contractile roots.
		A)	True
		B)	False


5	The three types of rocks that weather into parent material are metamorphic, igneous, and humus.
		A)	True
		B)	False


6	The field capacity of the soil is the amount of water that remains after the rest of the water has drained away by gravity.
		A)	True
		B)	False


7	In the root cap, amyloplasts function as gravity sensors to keep the root growing downward.
		A)	True
		B)	False


8	Roots that develop from a stem, leaf, or other plant part are called
		A)	root hairs.
		B)	adventitious roots.
		C)	taproots.
		D)	fibrous roots.


9	In which region of the root is the apical meristem found?
		A)	region of elongation
		B)	region of maturation
		C)	region of cell division
		D)	root cap


10	Which of the following statements about root hairs is NOT true?
		A)	They are tubular extensions of epidermal cells.
		B)	They develop into secondary roots.
		C)	They greatly increase the root's absorptive surface.
		D)	All of the above.
		E)	None of the above.


11	What is the name given to the band of suberin surrounding the cells of the endodermis?
		A)	pneumatophore
		B)	cortex
		C)	casparian strip
		D)	endomycorrhizae


12	Under what environmental conditions do pneumatophores develop?
		A)	swampy
		B)	dry and arid
		C)	areas with permanently frozen ground
		D)	none of the above


13	Which of the following is NOT an example of an aerial root?
		A)	prop root of corn
		B)	food storage root of dandelion
		C)	photosynthetic root of orchid
		D)	none of the above


14	What is the name given to the mutualistic relationship existing between fungi and roots?
		A)	haustoria
		B)	infection threads
		C)	adventitious roots
		D)	mycorrhizae


15	The correct sequence of horizons in a soil profile is
		A)	AEBC.
		B)	ABCDE.
		C)	EDCBA.
		D)	none of the above.


16	Soils in wet areas with low oxygen will have
		A)	low organic matter.
		B)	high acidity.
		C)	high organic matter.
		D)	high sand content.


17	Which type of soil particle forms micelles?
		A)	gravel
		B)	clay
		C)	silt
		D)	sand

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