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Multiple Choice Quiz
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Vascular Tissues: Phloem
Multiple Choice Quiz
1
P-protein
appears to function in:
A)
The movement of assimilates (sugars) throughout the sieve tube.
B)
Conveying information from the companion cell to the sieve element.
C)
Providing a site for the accumulation of callose.
D)
Plugging sieve plates upon mechanical damage.
E)
Enzymatic activities.
2
Gymnosperms typically possess:
A)
Sieve tube elements.
B)
Sieve cells.
C)
Companion cells.
D)
Both sieve tube elements and companion cells.
E)
Sieve cells with bordered pits.
3
In woody plants, primary phloem:
A)
Is organized into annual rings.
B)
Replaces secondary phloem.
C)
Possesses axial rays.
D)
Is derived from the vascular cambium.
E)
Is eventually crushed.
4
Upon maturity, sieve tube elements are missing:
A)
Nuclei.
B)
Cytoplasm.
C)
P-protein.
D)
Callose.
E)
Sieve pores.
5
In the functional, bicollateral vascular bundles of cucurbits, the phloem is:
A)
Surrounded by sclerified fibers.
B)
Almost all primary.
C)
Almost all secondary.
D)
All derived from procambium.
E)
All derived from ground meristem.
6
Caps
of P-protein are found:
A)
Throughout the sieve tube elements.
B)
At the top of a sieve element next to the sieve plate.
C)
At the bottom of a sieve element next to the sieve plate.
D)
Only at lateral sieve areas.
E)
In sieve cells, not sieve tube elements.
7
Albuminous cells:
A)
Are primarily found in dicots.
B)
Are primarily found in monocots.
C)
Are derived from the same mother cell as a sieve cell.
D)
Are positioned on the radial axis.
E)
Directly move sugars and protein in gymnosperms.
8
Sieve pores originate from:
A)
Callose deposits.
B)
Plasmodesmata.
C)
Microtubules.
D)
Sieve plates.
E)
Companion cells.
9
Which is
never
found in phloem?
A)
Secretory ducts
B)
Fibers
C)
Sclereids
D)
Parenchyma cells
E)
Torus and margo
10
Active sieve tube members that conduct assimilates may have:
A)
Ribosomes.
B)
Central vacuole.
C)
Golgi system.
D)
Endoplasmic reticulum.
E)
Tonoplast.
2003 McGraw-Hill Higher Education
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