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Level 1 Quiz
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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

Asexual reproduction in diatoms usually results in
A)same-sized progeny.
B)fertilized eggs.
C)one larger and one smaller cell.
D)naked offspring.
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

Pfiesteria becomes poisonous when
A)it reproduces.
B)it stops being a resting stage.
C)it produces light.
D)it invades corals and giant clams.
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

Foraminiferans and radiolarians feed by
A)using cilia to capture particles.
B)using flagella to grab prey.
C)using a network of pseudopodia to trap food.
D)stabbing their prey on spines.
15

Lichens are a type of fungus and thus are classified as strictly heterotrophic.
A)True
B)False
16

A lorica is the covering of which?
A)ciliate
B)diatom
C)dinoflagellate
D)coccolithophorid





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