Question

1.
What are the three most abundant macronutrients in plant tissues, and where are they obtained from?

A.)
N, P, K; obtained from the soil
B.)
C, H, O, obtained from water and air
C.)
N, P, K; obtained from the air
D.)
C, H, O; obtained from mycorrhizae

2. What is the function of the pericycle?

A.
It is the meristem layer in the root that forms new roots.
B.
It is the meristem layer that undergoes secondary growth in stems.
C.
It is the layer of cells in the roots that has a Casparian strip.
D.
It forms from axillary buds after apical dominance is removed.

3.The endodermal layer forces water and minerals to take the __________ route from cell to cell because of a suberin layer called the ____________.

A.
apoplastic; cuticle
B.
transmembrane; cuticle
C.
apoplastic; Casparian strip
D.
transmembrane; Casparian strip
E.
symplastic; cuticle

4. A plant cell has a water potential (Ψw) of -1 MPa, and is flaccid, having a turgor potential (Ψp) of 0 MPa. What is the solute potential (Ψs) of this cell?

A.
-2 MPa
B.
-1 MPa
C.
+2 MPa
D.
+1 MPa
E.
0 MPa