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Ch. 24 Test B

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

 1. 
Pollen grains are produced by
a.
male reproductive structures.
c.
ovules.
b.
female reproductive structures.
d.
flowers.
 

 2. 
In angiosperms, reproduction takes place in
a.
leaves.
c.
cones.
b.
flowers.
d.
pollen.
 

 3. 
A sticky secretion on the scales of seed cones traps
a.
sporophytes.
c.
pollen grains.
b.
pollen cones.
d.
egg cells.
 

 4. 
In an angiosperm, pollen grains are produced in the
a.
stigma.
c.
carpel.
b.
filament.
d.
anther.
 

 5. 
The triploid cell that grows into a food-rich tissue in the seed is called the
a.
endosperm.
c.
embryo sac.
b.
fruit.
d.
cotyledon.
 

 6. 
A ripened ovary that contains seeds is called a(an)
a.
embryo.
c.
fruit.
b.
ovule.
d.
vegetable.
 

 7. 
The seed type shown in Figure 24-5 that is generally dispersed by animals is(are)

mc007-1.jpg

Figure 24–5
a.
A
c.
both A and B
b.
B
d.
neither A nor B
 

 8. 
Seeds that are dispersed by wind and water typically are
a.
lightweight.
c.
nutritious.
b.
large.
d.
sweet and fleshy.
 

 9. 
Seeds of temperate plants tend to germinate in
a.
winter.
c.
summer.
b.
spring.
d.
fall.
 

 10. 
The early growth stage of a plant embryo is called
a.
fertilization.
c.
germination.
b.
dormancy.
d.
pollination.
 

 11. 
Some plants reproduce vegetatively by producing
a.
plantlets.
c.
flowers.
b.
seeds.
d.
pollen.
 

 12. 
A parent plant and its plantlets
a.
are not similar.
b.
are genetically identical.
c.
develop inside protective structures.
d.
must always remain attached.
 

 13. 
Grafting usually works best when plants are
a.
growing.
c.
dormant.
b.
germinating.
d.
pollinating.
 

 14. 
In a grafting, the cut stem that is attached to the parent plant is called the
a.
vascular cambium.
c.
scion.
b.
stock.
d.
cutting.
 

 15. 
Most people in the world depend on food crops such as
a.
sugar beets, cabbage, and broccoli.
b.
strawberries, chilies, and avocadoes.
c.
wheat, rice, and corn.
d.
apples, grapes, and strawberries.
 

Completion
Complete each statement using the following terms:

selective breeding         water         tube         ovary         anther
 

 16. 
In a flower’s stamen, the filament is topped by a(an) ____________________.
 

 

 17. 
A sperm nucleus moves toward a flower’s ovary through a long passageway called a pollen ____________________.
 

 

 18. 
A fruit is a ripened ____________________ that contains angiosperm seeds.
 

 

 19. 
Many lightweight seeds are dispersed by wind or ____________________.
 

 

 20. 
The efficiency of agriculture has been improved through the _________________________ of crop plants and improvements in farming techniques.
 

 



 
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