Marine Biology (Castro), 9th Edition

Chapter 6: Multicellular Primary Producers: Seaweeds and Plants

Chapter Quiz

1
Brown algae are dominant primary producers in which area?
A)Tropical coasts
B)Coral reefs
C)Mud flats
D)Temperate rocky coasts
2
Which of these features is not used to characterize major groups of seaweeds?
A)Photosynthetic pigments
B)Food reserves
C)Cell wall components
D)Type of roots
3
The holdfasts of seaweeds are analogous to roots because both provide an anchor and absorb nutrients and water to supply the entire algal body or thallus.
A)True
B)False
4
In some seaweeds, leaf-like portions called blades are kept near the sea surface with gas-filled bladders called pneumatocysts.
A)True
B)False
5
Which of these groups includes the largest algae, the giant kelps?
A)Chlorophyta
B)Rhodophyta
C)Cyanobacteria
D)Phaeophyta
6
A giant kelp typically grows very slowly because much of its huge thallus is in deep dark waters.
A)True
B)False
7
Green algae generally can be found in all of these habitats except:
A)Fresh water.
B)Polluted areas.
C)Estuaries.
D)Rocks exposed to heavy wave action.
8
Among red algae, dense clumps are characteristic of species living where?
A)In deep water below 200m
B)In areas rarely exposed to air
C)On upper levels of rocky coasts
D)As parasites on other algae
9
Which of these is partially responsible for adding calcium-carbonate in the making of coral reefs?
A)Sulfide-bacteria
B)Phaeophytes
C)Rhodophyte coralline algae
D)Mangroves
10
The process of meiosis in seaweeds will produce:
A)Always is identical diploid gametes.
B)A hermaphroditic zoospore.
C)Maybe a spore that produces a gametophyte.
D)A zygote.
11
Which of these is characteristic of flowering plants?
A)The sperm consists of motile zoospores.
B)A well-developed free-living gametophyte forms.
C)Marine and nearshore species do not have roots.
D)Leaves are present and sexually reproductive flowers.
12
The most common pattern of reproduction in seaweeds is like that of animals, resulting in a diploid adult thallus and haploid gametes.
A)True
B)False
13
What is the major use of algin?
A)To wrap Japanese food
B)As a medium to grow bacteria
C)As a stabilizer and emulsifier in the dairy industry
D)Directly as food
14
Seagrasses are considered to belong to the Kingdom Plantae because they
A)Carry on photosynthesis.
B)Can attach to sand.
C)Have chlorophyll.
D)Have specialized tissues that transport nutrients and food.
E)All of the above.
15
Sea grasses grow in clusters interconnected with horizontal root-like stems.
A)True
B)False
16
Cordgrasses of salt marshes
A)Belong to the same family as sea grasses.
B)Tolerate total submergence in seawater.
C)Can excrete excess salt.
D)Provide habitat and breeding grounds.
E)All of the above.
17
The northern limit of mangroves is set by which feature of the environment?
A)Salinity of the water
B)Frost
C)Light levels
D)Oxygen levels in the sediment
18
The most unique feature of mangroves as a tree species is:
A)They can grow directly in saltwater
B)They have hard seeds with woody coatings.
C)They are tropical.
D)They have woody roots.
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