WorksheetsChapter 15 Review
Total questions: 25
Worksheet time: 13mins
Organisms that float or drift in the ocean's currents
plankton
nekton
meroplankton
holoplankton
Organisms that can swim against currents (swim where they want to go):
plankton
nekton
meroplankton
holoplankton
Which term refers to the daily movement of zooplankton from the depths to the surface to feed on phytoplankton at night
holoplankton
meroplankton
vertical migration
water column
What type of plankton form the base of the oceanic food web and produces almost half of all atmospheric oxygen
phytoplankton
zooplankton
nekton
copepods
Surface layer of the ocean that receives sunlight.
Photic Zone
Aphotic Zone
Disphotic Zone
Benthic Zone
Diatoms are
phytoplankton
zooplankton
A copepod is
phytoplankton
zooplankton
How do most plankton stay afloat?
swim bladder
high lipid content
high muscle content
high surface area
Phytoplankton are responsible for this percentage of the primary production in the ocean:
25%
50%
75%
95%
How can whales change the climate?
By mixing the water column while feeding and stirring up nutrients that phytoplankton need
By defecating nutrients at the surface that they captured while feeding in deeper water
By increasing phytoplankton numbers which helps reduce carbon dioxide in the atmosphere
All answers are correct
What do phytoplankton need to perform photosynthesis?
sunlight
essential nutrients l
both answers are correct
How can phytoplankton be light-limited at high latitudes (polar regions)?
short days in the winter time
weak sunlight in the winter time
both answers are correct
What can cause the photic zone to be depth limited?
cloudy days
murky/dirty water
self-shading by phytoplankton
all answers are correct
What three nutrients are needed for primary production?
carbon, oxygen, and hydrogen
nitrogen, iron, and phosphorus
sodium, chloride, and calcium
What nutrient is usually in shortest supply in the ocean?
sulphur
iron
nitrogen
phosphorus
What causes the mixing of the water column at high latitudes (polar regions)?
overturn
upwelling
stratification
What factors contribute to a spring bloom?
shorter days, weak sunlight, little nutrients
longer days, intense sunlight, lots of nutrients
How are upwellings caused?
surface water becomes more dense and sinks and nutrient rich water rises
surface water moves offshore by wind and Coriolis effect, nutrient rich water rises
What is the Ekman Transport?
surface water getting more dense and sinking
surface water moving 90 degrees to wind direction
What produces equatorial upwellings?
trade winds
surface currents
surface water evaporating
all answers are correct
Nekton are defined as:
unable to swim against an ocean current (drift)
able to swim against an ocean current
Nekton have adaptations to _____________ drag (water resistance).
increase
reduce
Pelagic fish typically have these types of fins:
broad and highly maneuverable for sharp turns
narrow and very stiff for high speed steering
Muscles are more efficient when they are at:
colder temperatures
warmer temperatures
How does the rete mirabile help predatory pelagic fish?
cools their blood so they don't over heat in warm water
conserves heat in their blood to make them fast in cold water
both answers are correct
