Deck 13: Benthic Microorganisms, Seaweeds, and Sea Grasses

Question 1

An individual seaweed attached to the substratum is known as a

A) Stipe
B) Holdfast
C) Thallus
D) Blade

Answer 1

C

Question 2

Green seaweeds

A) Are exclusively unicellular
B) Use starch as their storage product
C) Include the coralline algae
D) Are exclusively multicellular

Answer 2

B

Question 3

Agar is extracted from a

A) Red seaweed
B) Bacterium
C) Green seaweed
D) Brown seaweed

Answer 3

A

Question 4

Sea grasses differ from seaweeds in

A) Having the ability to spread asexually
B) Having chlorophyll
C) Living on soft sediment
D) Having flowers

Question 5

Benthic diatoms differ from their planktonic relatives in

A) Being exclusively heterotrophic
B) Living in chains of cells only
C) Being usually bilaterally symmetrical
D) Living only in estuaries

Question 6

Seagrasses

A) Tend to live in waters deeper than kelps
B) Are never found in the tropics
C) Are very sensitive to low light conditions
D) Live only in estuaries

Question 7

Cyanobacteria

A) Only occur as single cells
B) Are capable of nitrogen fixation
C) Are closely related to fungi
D) Are filamentous in shape, unlike the fungi