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Chapter 26: Q. 15 (page 696)
Which of the following plant structures is not a defense against herbivory?
a. thorns
b. spines
c. nectar
d. alkaloids
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Megasporocytes will eventually produce which of the following?
a. pollen grain
b. sporophytes
c. male gametophytes
d. female gametophytes
Figure 26.8
At what stage does the diploid zygote form?
a. when the female cone begins to bud from the tree
b. at fertilization
c. when the seeds drop from the tree
d. when the pollen tube begins to grow
In the northern forests of Siberia, a tall tree is most likely a:
a. conifer
b. cycad
c. Ginkgo biloba
d. gnetophyte
Pollen grains develop in which structure?
a. the anther
b. the stigma
c. the filament
d. the carpel
Which of the following traits characterizes gymnosperms?
a. The plants carry exposed seeds on modified leaves.
b. Reproductive structures are located in a flower.
c. After fertilization, the ovary thickens and forms a fruit.
d. The gametophyte is the longest phase of the life cycle.
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