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Level 1 Quiz
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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

A seaweed with a large sporophyte and a tiny, barely visible gametophyte could be which of these?
A)sea lettuce
B)common red alga
C)giant kelp
D)any brown alga
9

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)cannot tolerate frost.
10

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.
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)fucoxanthins
D)all of the above





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