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Multiple Choice
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1
The holdfasts of seaweeds are analogous to roots because both provide an anchor and absorb nutrients to supply the entire algal body or thallus.
A)True
B)False
2
In some seaweeds, leaf-like portions called blades are kept near the sea surface with gas-filled bladders called pneumatocysts.
A)True
B)False
3
Certain species of the Cholorphyta dominate in environments with wide variations in salinity.
A)True
B)False
4
The Chlorophyta includes the largest algae, the giant kelps.
A)True
B)False
5
A giant kelp typically grows very slowly because much of its huge thallus is in deep dark waters.
A)True
B)False
6
The Rhodophyta are by far the most complex group of seaweeds in terms of thallus forms and size range.
A)True
B)False
7
The most common pattern of reproduction in seaweeds is like that of animals, with a diploid adult thallus and haploid gametes.
A)True
B)False
8
In some seaweeds, full-grown plants (thalli) can form at both diploid and haploid stages.
A)True
B)False
9
Sea grasses are closely related to the plants that grow in a typical home lawn.
A)True
B)False
10
Marine producers of the Kingdom Plantae consist of mosses, conifers, and angiosperms.
A)True
B)False
11
Sea grasses grow in clusters interconnected with horizontal root-like stems.
A)True
B)False
12
Salt marsh plants such as cordgrass are fully marine species.
A)True
B)False
13
Sea grasses, being angiosperms, reproduce with flowers that attract insects.
A)True
B)False
14
In some mangrove plants, seeds germinate before detaching from the parent tree.
A)True
B)False
15
The following are phycocolloid extracts of marine algae having economic value:
A)algin and carrageenan.
B)phycobilins and carotenoids.
C)fucoxanthin.
D)all of the above.





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