Name: 
 

Plant Review


Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

1. 
The cuticle
a.
conserves water.
b.
reduces absorption of carbon dioxide by the plant.
c.
reduces transpiration.
d.
helps prevent wilting.
e.
all of these
 

2. 
The cells that surround stomata are
a.
endodermal cells.
b.
guard cells.
c.
mesophyll cells.
d.
vascular bundle cells.
e.
vessel cells.
 

3. 
Sieve tubes are different from vessel cells because they
a.
carry water, not food.
b.
are not connected to each other.
c.
are alive, not dead like xylem cells.
d.
conduct minerals.
e.
carry water, not food and conduct minerals.
 

4. 
Photosynthesis takes place in the
a.
stomata.
b.
vascular bundles.
c.
cuticle.
d.
lower and upper epidermis.
e.
mesophyll tissue.
 

5. 
The veins of leaves are used for
a.
support.
b.
identification.
c.
transport of water and nutrients.
d.
detachment in the autumn.
 

6. 
Pollination occurs on the
a.
micropyle.
b.
stigma.
c.
style.
d.
anther.
e.
embryo sac.
 

7. 
Chemicals produced by one group of cells that affect distant target cells are called
a.
secretions.
b.
hormones.
c.
steroids.
d.
polymers.
e.
enzymes.
 

8. 
Which is NOT primarily related to asexual reproduction?
a.
parthenogenesis
b.
pollination
c.
runner formation
d.
cloning and tissue culture
e.
all of these
 

9. 
Insects are attracted to flowers by
a.
nectaries.
b.
specific colors.
c.
specific color patterns.
d.
floral odors.
e.
all of these
 

10. 
Which of the following is NOT an essential element for most land plants?
a.
sodium, Na
b.
potassium, K
c.
copper, Cu
d.
molybdenum, Mo
e.
all of these are essential
 

11. 
The major food transport substance in plants is
a.
oil.
b.
glucose.
c.
starch.
d.
fructose.
e.
sucrose.
 

12. 
The seed is produced by the development of the
a.
embryo.
b.
ovule.
c.
ovary.
d.
zygote.
e.
pollen.
 

13. 
Which of the following is true of monocots?
a.
has two cotyledons
b.
leaf veins usually netlike
c.
pollen grains with three pores
d.
vascular bundles throughout ground tissue
e.
floral parts in multiples of fours and fives
 

14. 
The primary function of the endosperm is
a.
protection.
b.
reproduction.
c.
growth.
d.
food storage.
e.
water absorption.
 

15. 
Water moves through a plant because of
a.
transpirational pull.
b.
the cohesion of water molecules.
c.
the strength of hydrogen bonds holding water molecules together.
d.
the replacement of lost water molecules.
e.
all of these
 

16. 
Annual growth rings are formed in woody stems principally through the activities of the
a.
pericycle.
b.
pith.
c.
vascular cambium.
d.
mesophyll.
e.
endodermis.
 

17. 
Studies on the growth of coleoptiles involve
a.
florigen.
b.
ethylene.
c.
auxin (IAA).
d.
abscisic acid.
e.
gibberellin.
 

18. 
The aging of a plant is known as
a.
senescence.
b.
vernalization.
c.
abscission.
d.
dormancy.
e.
chlorosis.
 

19. 
Synthetic auxins are used as
a.
pesticides.
b.
herbicides.
c.
fungicides.
d.
insecticides.
e.
all of these
 

20. 
In contrast to most other plant hormones, which hormone has mostly inhibitory effects?
a.
auxin
b.
gibberellin
c.
cytokinin
d.
abscisic acid
e.
ethylene
 

21. 
The requirement of cold weather before a particular plant process occurs (i.e., germination) is known as
a.
the biological clock.
b.
vernalization.
c.
photoperiodism.
d.
biennial life cycle.
e.
biorhythm.
 

22. 
A house plant that has been placed in the window will grow toward the source of light because auxin
a.
becomes more concentrated on the illuminated side of the plant.
b.
becomes less concentrated on the illuminated side of the plant.
c.
becomes more concentrated in the roots of the plant.
d.
inhibits the growth of cells on the shady side, so the cells on the sunny side grow faster.
 

23. 
A cotyledon is which of the following?
a.
embryonic root
b.
seed cover
c.
flower part
d.
seed leaf
e.
fruit
 

24. 
Cells that are the main water-conducting cells of a plant are
a.
sclereids.
b.
tracheids.
c.
sieve tubes.
d.
parenchyma.
e.
all of these
 

25. 
Which is the principal substance that regulates thigmotropism?
a.
auxin and ethylene
b.
gibberellin
c.
abscisic acid
d.
florigen
e.
none of these
 

26. 
Which of the following is true concerning the pollen grain?
a.
diploid
b.
formed from sperm cells
c.
two-celled
d.
produced by the pollen tube
 

27. 
Parenchyma cells are specialized for and involved in all but which of the following activities?
a.
photosynthesis
b.
wound healing
c.
conduction of food
d.
secretion
e.
food storage
 

28. 
Which of the following statements is false?
a.
Long-day plants bloom in the spring.
b.
Short-day plants bloom around noon.
c.
Short-day plants bloom in late summer and early fall.
d.
Chrysanthemums, cockleburs, and poinsettias are long-day plants.
e.
Day-neutral plants flower when mature enough to do so.
 

29. 
Perhaps a plant's greatest liability is its inability to
a.
produce growth hormones.
b.
use aerobic respiration.
c.
move when conditions around it deteriorate.
d.
produce its own lipids and proteins.
e.
respond to dwindling supplies of nutrients and water.
 

30. 
The value of a plant's sleep movements is possibly that they
a.
block moonlight from the lower leaves.
b.
reduce the amount of heat lost from the plant at night.
c.
allow heat transfer between leaves.
d.
speed the process of translocation between plant parts.
e.
block moonlight from the lower leaves and reduce the amount of heat lost from the plant at night.
 

31. 
The term angiosperm refers to the __________ of the flower.
a.
carpel
b.
ovary
c.
ovule
d.
stamens
e.
petals
 

32. 
The corolla is made up of
a.
sepals.
b.
petals.
c.
carpels.
d.
pollen grains.
e.
anthers.
 

33. 
Which of the following elements is obtained by plants directly from the atmosphere?
a.
nitrogen
b.
hydrogen
c.
carbon
d.
iron
e.
sulfur
 

34. 
The cells that function with the sieve tubes are the
a.
vessels.
b.
companion cells.
c.
adjunct cells.
d.
sclereids.
e.
periderm.
 

35. 
Mechanical stress is most closely related to
a.
phototropism.
b.
geotropism.
c.
hydrotropism.
d.
thigmotropism.
e.
aerotropism.
 

36. 
If all of the phloem were stripped from around a tree in a process known as girdling,
a.
the plant would stop growing.
b.
the vascular cambium would be destroyed so that the plant could no longer grow.
c.
the shoot system would get no moisture or minerals.
d.
the roots would starve and eventually the plant would die.
e.
there would be no problems unless the tree became infected by insects and fungi.
 

37. 
All but which of the following could have an effect on seed germination?
a.
moisture
b.
temperature
c.
minerals
d.
number of daylight hours
e.
oxygen
 

38. 
By definition, humus includes all of the following except
a.
feces.
b.
dead organisms.
c.
leaf litter.
d.
weathered rock.
e.
decomposing organic matter.
 

39. 
Which of the following are vascular plants?
a.
bryophytes
b.
ferns
c.
red algae
d.
green algae
e.
brown algae
 

40. 
Grasses reproduce by
a.
runners.
b.
corms.
c.
bulbs.
d.
tubers.
e.
rhizomes.
 



 
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