Multiple Choice Quiz

1		Which is produced in a centripetal direction by the cork cambium?
			A)	Phelloderm
			B)	Phellem
			C)	Phelloids
			D)	Both phelloderm and phelloids
			E)	Both phellem and phelloids
2		Which is not a site of phellogen initiation?
			A)	Epidermis
			B)	Subepidermal collenchyma
			C)	Cortex
			D)	Phloem
			E)	Xylem
3		What substance characterizes the cell walls of phellem?
			A)	Cellulose
			B)	Lignin
			C)	Suberin
			D)	Wax
			E)	Pectin
4		Periderm development is confined to stems.
			A)	True
			B)	False
5		Rhytidome is known as "inner bark."
			A)	True
			B)	False
6		Filling tissues is characterized by:
			A)	heavy, lignified walls.
			B)	large, intercellular spaces.
			C)	being a multiple epidermis.
			D)	having a Casparian strip.
			E)	it's meristematic activity.
7		Isolated secondary phloem may be found in rhytidome.
			A)	True
			B)	False
8		Which genus produces commercial bottle cork?
			A)	Acer
			B)	Juglans
			C)	Pinus
			D)	Quercus
			E)	Tilia
9		If periderm arises in roots, then what tissue most likely produces it?
			A)	Epidermis
			B)	Cortex
			C)	Endodermis
			D)	Pericycle
			E)	None—there is no periderm in roots
10		In what way is phellogen different from vascular cambium?
			A)	Mostly unifacial
			B)	Derivatives are same size and shape
			C)	Comprised of a single cell layer
			D)	Formed in a ring around the organ
			E)	Meristematic