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Multiple Choice
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1
Primary producers in the oceans are all microscopic photosynthesizers including bacteria, plants, and algae.
A)True
B)False
2
Stromatolites are calcareous mounds formed by colonies of cyanobacteria.
A)True
B)False
3
Cyanobacteria form a relatively minor component of the ocean's primary producers.
A)True
B)False
4
Heterotrophic bacteria are crucial for their role in recycling nutrients in dead organic matter.
A)True
B)False
5
Photosynthesis in cyanobacteria takes place in folded membranes in their cells whereas in eukaryotic algae it occurs in chloroplasts.
A)True
B)False
6
Diatoms have a protective covering made out of cellulose.
A)True
B)False
7
A diatom's protective covering is made of two tightly fitting halves like a box and lid, each of which produces a new, small half after separating during asexual reproduction.
A)True
B)False
8
Diatoms may produce resistant stages called auxospores when their frustules become too small.
A)True
B)False
9
Dinoflagellates move using two flagella, one wrapped around a central groove, and one trailing free.
A)True
B)False
10
Dinoflagellates are often responsible for toxic red tides and for the diffuse bioluminescence of the open sea.
A)True
B)False
11
Dinoflagellates are exclusively photosynthetic because all of them have chloroplasts.
A)True
B)False
12
Some dinoflagellates become zooxanthellae that inhabit the tissues of animals, forming generally beneficial partnerships.
A)True
B)False
13
Foraminifera are single cells that form chambered calcareous shells.
A)True
B)False
14
Foraminifera and radiolaria capture food by stabbing prey with thin, spiky cytoplasmic extensions.
A)True
B)False
15
Lichens are a type of fungus and thus are classified as strictly heterotrophic.
A)True
B)False
16
Limestone and chalk beds are often made out of the shells of
A)foraminiferans.
B)radiolarians.
C)diatoms.
D)dinoflagellates.





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