Increased public awareness of the importance of wetlands in
southern California really began:
in the l970s.
At Malibu, the major concern over large amounts of water in a
short time is that it will:
cause weakening of the subsurface soil, leading to landslides
Recent statistics suggest that _____ of the nation's wetlands have
been either altered or destroyed within the last 100 years.
What caused the Navy to become "good stewards" of the land at Point Mugu?
legislation came into effect that required more protective measures
The landslide threats at Malibu are currently being addressed in
the form of:
public awareness and education programs
Major fluctuations in sea level during recent geologic time is
blamed for increased coastal erosion at:
During heavy storms the sewage treatment system for Point Mugu
may overflow. At such times, the Navy directs that overflow:
into a lined pond
At Aliso Creek, the natural process of surface water percolation
and filtration through the soil has been interrupted by
road building and paving
The sand removed from the Ventura Marina navigation channel is
transported to downcoast beaches
The shark (fish), penguin (bird), dolphin (mammal), and ichthyosaur (reptile) all have a similar streamlined torpedo-like shape. This is a good example of:
Which of these forms of nitrogen is most abundant but least useful to most living things?
nitrogen gas, N2
Among other things, calcium and silicates are used by marine organisms:
as a component of shells and skeletons
Air pressure at sea level is one atmosphere. As you descend into the ocean the pressure will increase by one atmosphere with each ____ feet of depth.
Animals with hemoglobin and a proliferation of elaborate tentacles and branhae are likely adapted to:
Which of these is true about the swim bladders of fishes?
They are primarily used to regulate buoyancy
Generally speaking, about ____ of the energy in any lower trophic level is passed to the next higher level?
In a light/dark bottle experiment, the compensation depth is where:
total oxygen production in the light bottle is zero
Ocean primary production is actively researched for all these reasons except:
its importance in the hydrogen cycle
Two of our invertebrate phyla possess a number of similar characteristics: bilateral symmetry, obvious heads, well-developed nervous systems, and flow-through digestive tracts. Those two phyla are:
Mollusca and Annelida
Sponges are considered to be the most primitive of animals because they:
have only a few types of cells
The flatworms (phylum Platyhelminthes) are considered to be advanced compared to sea anemones because they possess:
a rudimentary central nervous system
Which of these processes was made more efficient by the evolution of photosynthesis and the availability of free oxygen?
processing of food molecules and energy release
Tapeworms, zooxanthella, and pilot fish each have a________
relationship with another organism.
Under which of the following conditions is a J-shaped growth curve most likely?
a population that is reproducing in the absence of limiting factors
Clear patterns of zonation would probably be most obvious in the
An abundant metal dissolved in seawater and extracted by chemical
and electrical means is:
Compared to land based agriculture, marine animals and plants
constitute about ___ of the human intake of protein worldwide.
Plastic drift nets that are lost and continue to kill marine life
for decades are called:
Ranching is a form of mariculture in which the organisms are started as juveniles in pens, then released to the wild so they can be caught by traditional fisheries methods. Which of the following species is an ideal candidate for ranching?
Mare Liberium, the treatise that forms the basis of contemporary laws of the sea, was composed by:
Hugo Grotius in 1604
In addition to causing skin cancers in humans, overexposure to ultraviolet rays can cause:
The group of pollutants which were Rachel Carson's target in the1960s were the:
Biological amplification of DDT had what effect on brown pelicans in the early 1960s?
egg shells too thin
Which of these is not being blamed on the introduced Chinese mitten crab?
human illness from eating them
New and potentially threatening exotic species of organisms are being introduced into marine ecosystems from:
ship ballast water
At the present birth rate, about how many humans will join the world population in the next 10 years?
The United States generates about _________ of the planet's industry-related carbon dioxide.
Combustion of fossil fuels for energy releases many gases into the atmosphere. Which of these is causing the most concern?
Eutrophication can lead to large oceanic phytoplankton blooms. When these "blooms" die and sink to the bottom, their decomposition can:
use up the oxygen needed by benthic organisms
The array of buoys extending across the tropical Pacific Ocean that monitor air and sea temperature and help forecast El Niño events is called:
Which of these motivations seems least important to the oceanographers in episode 26.
Primary production for both reef-building corals and hydrothermal tube worms is greatly influenced by:
The theory of evolution by natural selection and the Big Bang theory are considered to be theories because they are/were:
widely tested, supported by scientific evidence, and considered to be the best current explanation of a phenomenon
Each of these increases the concentration of dissolved nitrogen and phosphorus in the ocean except: