Marine bio

The mesopelagic zone extends from about 200 m to about: (10 points)

a. 300 m
b. 500 m
c. 1,000 m
d. 2,000 m
e. 4,000 m

The water below the oxygen minimum layer has: (10 points)

a. no oxygen at all
b. only very small traces of oxygen
c. some of the oxygen it had when it left the surface
d. most of the oxygen it had when it left the surface

The zone immediately below the bathyal zone is called the: (10 points)

a. abyssal
b. hadal
c. subtidal
d. subbathyal
e. mesopelagic

Deep-sea pelagic fishes are characterized by all of the following except: (10 points)

a. small eyes
b. absent or reduced swim bladder
c. color spotted with red
d. flabby muscles
e. large mouth and teeth

Pheromones are special chemicals that are used to: (10 points)

a. digest food
b. attract mates
c. catch prey
d. transport oxygen
e. produce bioluminescence

The deep-sea benthos consists mostly of: (10 points)

a. deposit feeders
b. filter feeders
c. herbivores
d. omnivores
e. carnivores

The deep-sea scavengers include animals that feed on: (10 points)

a. deep-sea plankton
b. bottom meiofauna
c. particulate organic matter
d. dead animals
e. bacteria

Bacteria thriving around deep-sea hydrothermal vents are: (10 points)

a. photosynthethic
b. symbiotic
c. heterotrophic
d. parasitic
e. chemiosynthetic

The major advantage that deep-sea benthic animals have over pelagic ones is that their food: (10 points)

a. is easier to digest
b. falls to the bottom and stays in one place, thus being available for a longer time
c. gets to be eaten before it gets to pelagic animals
d. gets less decayed by bacteria
e. produces less detritus

A shrimp that occurs in large numbers around deep-sea hydrothermal vents does not have eyes. Light-sensitive