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Plants and Society, 3/e
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The Algae
Quiz
1
1. The alga thallus is composed primarily of undifferentiated tissue that can be single cells, filamentous, or parenchymatous.
A)
True
B)
False
2
2. Unlike plants, algae zygotes develop into a multicellular embryo that is retained in the female gametangium.
A)
True
B)
False
3
3. The blue-green color of the cyanobacteria is due to the presence of _______.
A)
a. phycoerythrin
B)
b. phycobilins
C)
c. phycocyanin
D)
d. chlorophyll a
4
4. What is the function of heterocysts in the cyanobacteria?
A)
a. nitrogen fixation
B)
b. asexual reproduction
C)
c. sexual reproduction
D)
d. photosynthesis
5
5. Which division of algae is composed of silicon-based walls that are formed in halves?
A)
a. Euglenophyta
B)
b. Chrysophyta
C)
c. Cyanobacteria
D)
d. Pyrrophyta
6
6. Algae in the Division Chlorophyta are characterized by a flexible pellicle and two flagella.
A)
True
B)
False
7
7. Sexual reproduction in which the egg is large and nonmotile and the sperm is smaller and flagellated is called _______.
A)
a. gametangia
B)
b. anisogamy
C)
c. isogamy
D)
d. oogamy
8
8.
Fucus
is an alga in the Division Phaeophyta that produces conceptacles used in sexual reproduction.
A)
True
B)
False
9
9. Algae are valued nutritionally because of their high ________ content.
A)
a. lipid
B)
b. folic acid
C)
c. vitamin D
D)
d. protein
10
10. The food additives carrageenan and agar are obtained from red algae, whereas alginic acid is derived from brown algae.
A)
True
B)
False
11
11. Drug testing for sea-based pharmaceuticals has been slow to develop due to
A)
a. the toxic compounds found in most algae.
B)
b. the inability to secure adequate amounts.
C)
c. the lethal side effects of most algae.
D)
d. all of the above.
12
12. Red Tides are caused by two species of cyanobacteria that infect marine organisms and cause them to turn red.
A)
True
B)
False
13
13. Which organism is responsible for killing fish by injuring fish skin and causing them to lose the ability to maintain osmotic balance?
A)
a.
Pfisteria
B)
b.
Anabaena
C)
c.
Amphidinium
D)
d.
Microcystis
14
14. The diatom
Chaetocerus
produces long spines that lodge in fish gills, triggering the release of mucus and causing suffocation.
A)
True
B)
False
15
15. The zebra mussel, kudzu, and chestnut blight fungus are all examples of invasive species.
A)
True
B)
False
16
16. Which of the following is NOT a reason for the success of
Caulerpa taxifolia
?
A)
a. They reproduce easily by asexual reproduction.
B)
b. They can grow on any ocean substrate.
C)
c. They thrive in cold water.
D)
d. none of the above.
E)
e. a and c are correct.
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