©Jason MacConnell 2025 ALL RIGHTS RESERVED.
OCEAN 101 Exam 3 Questions With Correct
Answers A+
All bacteria are heterotrophs (True/false) - Answer✔False
Organisms that can produce energy from inorganic compounds and also consume other
organisms are best referred to as - Answer✔mixotrophs
Cyanobacteria are characterized by being _____. - Answer✔photosynthetic.
In the open ocean photosynthesis can occur to an average depth of ______ m. - Answer✔150-
200 m
The standing stock of a population is equivalent to its biomass. - Answer✔False.
Diatoms are able to:
form chains to help floating.
produce two flagella that provide motility and reduce sinking.
store oil to reduce their density. - Answer✔Form chains to help floating.
Store oil to reduce their density.
Dinoflagellates and coccolithophores belong to what group of marine organisms? -
Answer✔Phytoplankton?
The dominant phytoplankton in the open ocean are members of picoplankton. - Answer✔False
As organic material sinks through the ocean, much of it is remineralized or recycled by -
Answer✔heterotrophic bacteria.
Primary productivity per square meter of ocean surface is, on the average, higher in the neritic
zone than in the oceanic zone. - Answer✔true
Examples of holoplankton include which of the following? Select all that apply.
, ©Jason MacConnell 2025 ALL RIGHTS RESERVED.
crab zooea
euphausiids
copepods
amphipods. - Answer✔Euphausiids
Copepods
Amphipods
Which of the following is gelatinous holoplankton? Select all that apply.
salps
radiolarians
ctenophores
cnidarians
copepods - Answer✔Salps, ctenophores, cnidarians.
Zooplankton are: - Answer✔Animals (hetertrophes) that cannot swim against horizontal ocean
currents.
The larval stages of species that later become free swimmers or benthic species are called: -
Answer✔Meroplankton
True or False? Zooplankton are non-motile (sessile) - Answer✔False.
Sessile organisms live attached to the seafloor. - Answer✔True
Animals that live on bits and pieces of organic material washed in from the sea or off the land
are called - Answer✔detritus feeders.
Animals that burrow into the seafloor are members of the epifauna. - Answer✔False
Most animals that live within the sand and mud feed on detritus. - Answer✔True
Species of epifauna are less abundant than species of infauna. - Answer✔False
Sessile organisms live attached to the seafloor. - Answer✔True
Animals that live on bits and pieces of organic material washed in from the sea or off the land
are called - Answer✔detritus feeders.
Animals that burrow into the seafloor are members of the epifauna. - Answer✔False
OCEAN 101 Exam 3 Questions With Correct
Answers A+
All bacteria are heterotrophs (True/false) - Answer✔False
Organisms that can produce energy from inorganic compounds and also consume other
organisms are best referred to as - Answer✔mixotrophs
Cyanobacteria are characterized by being _____. - Answer✔photosynthetic.
In the open ocean photosynthesis can occur to an average depth of ______ m. - Answer✔150-
200 m
The standing stock of a population is equivalent to its biomass. - Answer✔False.
Diatoms are able to:
form chains to help floating.
produce two flagella that provide motility and reduce sinking.
store oil to reduce their density. - Answer✔Form chains to help floating.
Store oil to reduce their density.
Dinoflagellates and coccolithophores belong to what group of marine organisms? -
Answer✔Phytoplankton?
The dominant phytoplankton in the open ocean are members of picoplankton. - Answer✔False
As organic material sinks through the ocean, much of it is remineralized or recycled by -
Answer✔heterotrophic bacteria.
Primary productivity per square meter of ocean surface is, on the average, higher in the neritic
zone than in the oceanic zone. - Answer✔true
Examples of holoplankton include which of the following? Select all that apply.
, ©Jason MacConnell 2025 ALL RIGHTS RESERVED.
crab zooea
euphausiids
copepods
amphipods. - Answer✔Euphausiids
Copepods
Amphipods
Which of the following is gelatinous holoplankton? Select all that apply.
salps
radiolarians
ctenophores
cnidarians
copepods - Answer✔Salps, ctenophores, cnidarians.
Zooplankton are: - Answer✔Animals (hetertrophes) that cannot swim against horizontal ocean
currents.
The larval stages of species that later become free swimmers or benthic species are called: -
Answer✔Meroplankton
True or False? Zooplankton are non-motile (sessile) - Answer✔False.
Sessile organisms live attached to the seafloor. - Answer✔True
Animals that live on bits and pieces of organic material washed in from the sea or off the land
are called - Answer✔detritus feeders.
Animals that burrow into the seafloor are members of the epifauna. - Answer✔False
Most animals that live within the sand and mud feed on detritus. - Answer✔True
Species of epifauna are less abundant than species of infauna. - Answer✔False
Sessile organisms live attached to the seafloor. - Answer✔True
Animals that live on bits and pieces of organic material washed in from the sea or off the land
are called - Answer✔detritus feeders.
Animals that burrow into the seafloor are members of the epifauna. - Answer✔False
