Deck 5: The Microbial World

Question 1

Which of the following are considered to be extremophiles due to the habitats they exist in?

A)Marine lichens
B)Diatoms
C)Archaea
D)Radiolarians

Answer 1

C

Question 2

Archaea are now being detected in many environments by identifying one of the following chemicals characteristic of the group:

A)Pigments.
B)Chlorophyll.
C)Nucleic acids.
D)Proteins.
E)Carbohydrates.

Answer 2

C

Question 3

Which of the following is not true of decay bacteria?

A)Break down waste products and dead organic matter
B)Carry out photosynthesis
C)Are heterotrophs
D)Are particularly abundant in bottom sediments
E)Ensure the recycling of essential nutrients

Answer 3

B

Question 4

Which of the following would be classified as autotrophic?

A)Cyanobacteria.
B)Lysogenic viruses.
C)Bacteriophages.
D)All answers are correct.
E)Lysogenic viruses and Bacteriophages only.

Question 5

Bacteria that make their own organic compounds by obtaining energy from chemical compounds and not directly from light are known as:

A)Heterotrophic.
B)Decay.
C)Photosynthetic.
D)Protists.
E)Chemosynthetic.

Question 6

Generally the dominant group of planktonic primary producers in cold water:

A)Foraminiferans.
B)Silicoflagellates.
C)Dinoflagellates.
D)Photosynthetic bacteria.
E)Diatoms.

Question 7

Some planktoic cyanobacteria have the ability to "fix" which of the following elements thus having a fertilizing effect on the marine environment similar to the ability of the land plants legumes?

A)Oxygen
B)Helium
C)Hydrogen
D)Nitrogen

Question 8

Which of the following can be dangerous to human health?

A)Diatoms
B)Dinoflagellates
C)Radiolarians
D)All answers are correct
E)Diatoms and Dinoflagellates only

Question 9

Endophytes are primary producers that live:

A)On the surface of planktonic organisms.
B)Inside primary producers.
C)Inside animals.
D)On the surface of animals.
E)Within decay organisms.

Question 10

Bacteriophages are types of:

A)Archea.
B)Bacteria.
C)Protozoa.
D)Algae.
E)Viruses.

Question 11

Cyanobacteria are characterized by being:

A)Decomposers.
B)Found only in the plankton.
C)Having a glass-like skeleton.
D)Protists.
E)Photosynthetic.

Question 12

Prokaryotes differ from eukaryotes in regards to:

A)Shape of DNA molecules.
B)Size of ribosomes.
C)Presence of nucleus.
D)All answers are correct.
E)Shape of DNA molecules and Size of ribosomes only.

Question 13

Which of the following does not apply to protozoans?

A)Multicellular.
B)Their name derives from "first animals".
C)Some are heterotrophs.
D)Are included among the Protista.
E)Some are autotrophs.

Question 14

Organisms having a shell made of silica (SiO₂):

A)Foraminiferans.
B)Stromatolites.
C)Cyanobacteria.
D)Diatoms.
E)Ciliates.

Question 15

Marine fungi:

A)Are mostly photosynthetic.
B)Are parts of lichens that live on rocky shores.
C)Secrete calcareous skeletons.
D)Produce red tides.
E)None of the choices are correct: there are no marine fungi.

Question 16

Diatoms are mostly:

A)Heterotrophs.
B)Planktonic.
C)Multicellular.
D)Red in color.
E)Prokaryotic.

Question 17

Red tides are caused mostly by:

A)Diatoms.
B)Foraminiferans.
C)Dinoflagellates.
D)Red seaweeds.
E)Radiolarians.

Question 18

One of the following statements about marine viruses is not true:

A)Are involved in the release of DOM (dissolved organic matter)into the water.
B)Bridge the gap between the non-living and the living.
C)Their genetic material is in the form of DNA or RNA.
D)Cause diseases in many types of organisms.
E)Consist of minute cells sometimes attached into chains.

Question 19

Archaea are classified as being:

A)Prokaryotic.
B)Autotrophs only.
C)Heterotrophs only.
D)Consisting of nucleic acids and a protein coat.
E)Eukaryotic.

Question 20

Dinoflagellates that live in association with reef-building corals and other animals are known as:

A)Zooxanthellae.
B)Zooplankton.
C)Silicoflagellates.
D)Bioluminescent dinoflagellates.
E)Cryptomonads.

Question 21

An algal bloom is defined as:

A)Mass reproduction of algal cells.
B)Mass death of algal cells.
C)Mass feeding on algal cells by zooplankton.
D)Mass vertical migrations of algal cells.
E)Mass horizontal migrations of algal cells.

Question 22

What is the function of an auxospore?

A)Floatation
B)Hunting
C)Photosynthesis
D)Reproduction
E)Restore normal size

Question 23

What feature do all protozoa share?

A)Reproductive strategies
B)Habitats
C)Feeding strategy
D)Structure
E)Being unicellular

Question 24

Zooxanthellae,which live symbiotically with many species,are classified as:

A)Diatoms.
B)Dinoflagellates.
C)Radiolarians.
D)Foraminiferans.
E)Lichens

Question 25

Which of the following are not protists?

A)Dinoflagellates
B)Cyanobacteria
C)Diatoms
D)Foraminiferans
E)Ciliates

Question 26

Which of the following are not protozoans?

A)Radiolarians
B)Foraminiferans
C)Dinoflagellates
D)Ciliates
E)Unicellular,planktonic organisms whose sediments form huge limestone deposits on land

Question 27

Radiolarians are characterized by:

A)Being mostly planktonic.
B)Having a calcareous skeleton.
C)Being autotrophs.
D)Having two flagella.
E)Causing red tides.

Question 28

Bioluminescence is observed in:

A)Diatoms.
B)Dinoflagellates.
C)Radiolarians.
D)Foraminiferans.
E)Lichens.

Question 29

A survival advantage of __________________ is the ability to withstand exposure to air for long periods of time during tidal cycles.

A)Diatoms
B)Dinoflagellates
C)Radiolarians
D)Foraminiferans
E)Lichens

Question 30

What is the purpose of the spines seen on the frustules of diatoms?

A)Floatation
B)Hunting
C)Photosynthesis
D)Reproduction
E)Restore normal size