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A variable that is kept constant in an experiment.
A control can be best defined as:
Make judgments about ethics, values, and morality.
A limiting factor of science is that it cannot:
All fishes leap out of the water.
A marine biologist observes that mako sharks, sardines, and salmon leap out of the water. An example of induction from these observations is:
An artificially created situation to test a hypothesis.
An experiment can be best described as:
Since tuna are fish, tuna lay eggs.
From the general statement "All fishes lay eggs," which of the following results from deduction:
Variables.
The factors that might affect observations and can be manipulated are called:
Procedures used to learn about our world.
The scientific method can be best described as:
71%
How much of the Earth's surface is covered by the world ocean?
Pacific Ocean.
The world's largest and deepest ocean is:
Around Antarctica
Oceanographers often use the name "Southern Ocean" to refer to the body of water:
Southern hemisphere.
The largest percentage of the world ocean is found in the:
The mass of a substance per unit volume
Density is:
Outer core.
The earth's magnetic field is thought to be caused by movements of liquid metal in which of the earth's layers?
Mantle
The semi-solid layer of the earth found below the crust and outside of the core is called the:
Mid-ocean ridges
New sea floor (oceanic lithosphere) is created at ____________ ?
Erosion and weathering of rocks
Lithogenous sediments are those that come from:
Continental shelf
The most biologically rich part of the ocean is the:
Shelf break
The outer edge of the continental margin is the:
Continental shelf
The shallow part of the continental margin that is closer to land and is a critical marine habitat because light can reach all the way to the bottom in most of it is known as:
Arctic Ocean.
The world's smallest and shallowest ocean is:
Float on the upper mantle
Which of the following is true about lithospheric plates?
Ability to eat prey bigger than themselves
An important feeding adaptation among deep-sea fishes:
Chemosynthetic
Bacteria thriving around deep-sea hydrothermal vents are:
Oxygen
In addition to food, deep-water animals depend on the surface for:
Light-producing organs
Photophores are:
Deposit feeders
The deep-sea benthos consists mostly of:
Hadopelagic
The deepest of ocean waters are classified as:
Hydrogen sulfide
The energy source for the bacteria that thrive around deep-sea hydrothermal vents is:
It filter-feeds on chemosynthetic bacteria
The giant deep-sea hydrothermal vent tubeworm feeds on:
Counterillumination
The presence of bioluminescent organs on the underside of mid-water fishes is involved in:
Abyssopelagic
The zone immediately below the bathypelagic zone is called the:
Large circular systems of surface currents.
Gyres are:
Lower oxygen content
How does the oxygen content of the ocean compare to the air that humans breathe?
Hydrogen and oxygen atoms of adjacent molecules.
Hydrogen bonds in water molecules are formed between:
10 meters of depth.
Pressure increases with depth by adding one atmosphere of pressure for every:
Wind
The Eckman spiral occurs as a result of:
Temperature.
The factor that most affects wind patterns in the atmosphere of the earth:
Crest
The highest part or top of a wave is called the:
Between the warm and cold layers
The main thermocline is located at the zone:
The relative concentration of ions does not change.
The rule of constant proportions expresses that:
Parts per thousand.
The salinity of water is generally expressed in:
How much light penetrates through the water column.
The secchi disk is used to indirectly estimate:
Slower, less
When water cools, but does not freeze, the molecules move ______________ and take up ______________ space.
Sodium and chloride
Which ions comprise about 85% of the solutes in seawater?
Maximum density of water
Which of the following is the state of water at a temperature of 4°C ?
It is less dense as a solid than a liquid
Which of the following properties is unique to water due to it's molecular structure?
Community
A group of different species together on a rocky beach is an example of a(an):
Fertilization
All of the following are examples of asexual reproduction except:
Fuse during fertilization to form a zygote
Male gametes (sperm) and female gametes (eggs):
Osmoconformers
Marine organisms whose internal salt concentration varies with that of their environment are examples of:
That retain some of its metabolic heat
The term "endotherms" is applied to those organisms:
The community or communities and the physical environment
The term ecosystem best encompasses which one of the following:
Tend to lose water by osmosis since their internal salt concentration is lower than that of seawater
Typical marine fishes:
Prokaryotes-sponges
Which of the following are not correctly paired?
Kingdom, phylum, family, genus, species
Which of the following shows the correct order of taxonomic levels?
Bacteria are eukaryotic
Which of the following statements regarding bacteria is NOT true?
Mass reproduction of algal cells
An algal bloom is defined as:
Prokaryotic
Archaea are classified as being:
Chemosynthetic
Bacteria that make their own organic compounds by obtaining energy from chemical compounds and not directly from light are known as:
Dinoflagellates
Bioluminescence is observed in:
Photosynthetic
Cyanobacteria are different from most other bacterial-type cells because they are _______?
Zooxanthellae
Dinoflagellates that live in association with reef-building corals and other animals are known as:
Inside primary producers
Endophytes are primary producers that live:
Diatoms
The type of algae that have a shell made of silica (SiO2) are called?
All of the above
Prokaryotes differ from eukaryotes in regards to:
Dinoflagellates
Red tides are caused mostly by:
Archaea
Which of the following are considered to be extremophiles due to the habitats they exist in?
Multicellular
Which of the following does not apply to protozoans?
Carry out photosynthesis
Which of the following is not true of decay bacteria?
Cyanobacteria
Which of the following would be classified as autotrophic?
The ocean invaded lowlands and river mouths
Coastal plain estuaries were formed when:
Can survive changes in salinity
Euryhaline species:
Depth increases
In an estuary, salinity of the water increases as:
Infauna
Large organisms of the mudflats are more likely to be:
Flowering plants
Mangroves belong to one of the following groups:
Allowing the salinity of their body fluids to vary with that of the surrounding water
Osmoconformers survive changes in salinity by:
Oxygen levels increase
The amount of hydrogen sulfide in the sediment increases with all the following changes except one:
Breeding grounds for many marine species
The greatest importance of estuaries to the entire world oceanic ecosystem is as:
Detritus
The infauna of mud flats feeds mostly on:
Mud
The most common type of substrate in estuaries:
Moves inland as tide moves in
The salt wedge in the water column of an estuary:
Height of the tide
The zonation of plants in salt marshes is determined mostly by:
Kingdom Plantae
Algae are included among the Protista. Some biologists, however, place the green algae in the:
photosynthetic
Algae and many bacteria are primary producers. In contrast to the bacteria that are primary producers all types of algae are:
Accumulate calcium carbonate
Coralline red algae receive this name due to their ability to:
Have no true roots, leaves, or stems
Macroalgae (seaweed) can be best differentiated from true plants because macroalgae (seaweed):
Are mostly multicellular
Macroalgae can be best differentiated from the phytoplankton because the marcoalgae:
Are well protected from strong wave action
Mangroves live in coastal waters that:
Reproduce by producing seeds
Marine flowering plants can be best differentiated from macroalgae (seaweed) by the fact that the marine flowering plants:
Kelps
Marine vascular flowering plants include all of the following except:
Halophytes
Salt-tolerant plants such as salt-marsh plants are called:
Red algae
The group of macroalgae (seaweed) with the largest number of species is the:
Brown algae
The most complex and largest of all the macroalgae (seaweed) is included among one of these groups:
Holdfast
The root-like, anchoring structure of many macroalgae (seaweed) is called the:
Atlantic Ocean
The Sargasso Sea is found in the:
Mollusc
A nudibranch is a type of:
An Annelid
A polychaete worm is:
Crab
A zoea would be a larval form of which of these organisms?
Reef coral
An example of an anthozoan is:
Some are autotrophs
Animals, all members of the kingdom Animalia, are characterized by all of the following except one: