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Multiple Choice Quiz
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1

Primary producers in the oceans are all microscopic photosynthesizers including bacteria, plants, and algae.
A)T
B)F
2

Stromatolites are calcareous mounds formed by colonies of cyanobacteria.
A)T
B)F
3

Cyanobacteria form a relatively minor component of the ocean's primary producers.
A)T
B)F
4

Heterotrophic bacteria are crucial for their role in recycling nutrients in dead organic matter.
A)T
B)F
5

Photosynthesis in cyanobacteria takes place in folded membranes in their cells, whereas in eukaryotic algae it occurs in chloroplasts.
A)T
B)F
6

Diatoms have a protective covering made out of cellulose.
A)T
B)F
7

A diatom's protective covering is made of two tightly fitting halves like a box and lid; each of which produces a new, smaller half after separating during asexual reproduction.
A)T
B)F
8

Diatoms may produce resistant stage called auxospores when their frustules become too small.
A)T
B)F
9

Dinoflagellates move using two flagella, one wrapped around a central groove and one trailing free.
A)T
B)F
10

Dinoflagellates are exclusively photosynthetic since all have chloroplasts.
A)T
B)F
11

Dinoflagellates are often responsible for toxic red tides and for the diffuse bioluminescence of the open sea.
A)T
B)F
12

Some dinoflagellates become zooxanthellae that inhabit tissues of animals, forming generally beneficial partnerships.
A)T
B)F
13

Foraminifera are single cells that form chambered calcareous shells.
A)T
B)F
14

Foraminifera and radiolaria capture food by stabbing prey with thin, spiky cytoplasmic extensions.
A)T
B)F
15

Tintinnids are ciliate protozoans that make a vase-like case for protection.
A)T
B)F
16

Lichens are a type of fungus and thus are classified as strictly heterotrophic.
A)T
B)F
17

Limestone and chalk beds are often made out of the shells of
A)foraminiferans.
B)radiolarians.
C)diatoms.
D)dinoflagellates.





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