student view
|
instructor view
|
information center view
|
Home
Plant Anatomy
student view
How to Write a Paper
Botany Issues Map
Scientific Names
Biological Controls
Useful Plants
Houseplants
Metric Conversions
Plant Tissues
Choose an Unit
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
Unit 10
Unit 11
Unit 12
Unit 13
Unit 14
Unit 15
Unit 16
Unit 17
Unit 18
Unit 19
Unit 20
Unit 21
Unit 22
Unit 23
Unit 24
Multiple Choice Quiz
Feedback
Help Center
The Leaf: Basic Organization
Multiple Choice Quiz
1
Hypostomatous leaves have:
A)
no stomata.
B)
paracytic stomata.
C)
stomata on abaxial epidermis.
D)
stomata always open as a part of a hydathode.
E)
a lack of stomatal chambers.
2
An
areole
is:
A)
a leaf mesophyll region limited by vascular tissues.
B)
an air space within the mesophyll of a leaf.
C)
the opening of a stomate.
D)
an enlargment of a petiole.
3
Mestome
sheath cells:
A)
possess large chloroplasts with starch.
B)
have thickened walls.
C)
function as bulliform cells.
D)
encircle only the phloem of leaf veins.
E)
are commonly found in C
3
plants.
4
Leaf abscission is early recognized by the appearance of:
A)
separation of the vascular tissues.
B)
an accumulation of starch at the site of abscission.
C)
meristematic activity of the protoderm.
D)
cell division parallel to the axis of the petiole.
E)
tabular cells in the abscission zone.
5
What plant growth regularly helps promote the formation of leaf abscission?
A)
Gibberellin
B)
Abscisic acid
C)
Ethylene
D)
Auxin
E)
Florigen
6
When the two sides of mesophyll of a leaf are similar in stucture, the leaf is said to be:
A)
hypostomatous.
B)
mesophytic.
C)
dorsiventral.
D)
unifacial.
E)
tubular.
7
Commissural veins are found:
A)
in dicots.
B)
connecting parallel veins.
C)
as leaf mid-veins.
D)
only in petioles.
E)
where there is dichotomous vein branching.
8
"Closed" minor veins lack:
A)
secondary walls.
B)
a bundle sheath.
C)
companion cells.
D)
plasmodesmata.
E)
protoplasmic structure.
9
What is missing in Kranz anatomy?
A)
Bundle sheath
B)
Palisade mesophyll
C)
Spongy mesophyll
D)
Stomata
E)
Vascularization
10
Bulliform cells:
A)
enable the leaf to fold.
B)
are found in the endodermis.
C)
are highly photosynthetic.
D)
are characteristic of xeromorphic plants.
E)
are derived from procambium.
2003 McGraw-Hill Higher Education
Any use is subject to the
Terms of Use
and
Privacy Policy
.
McGraw-Hill Higher Education
is one of the many fine businesses of
The McGraw-Hill Companies
.
2003 McGraw-Hill Higher Education