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:
The lagoon at Malibu is often contaminated by:
septic tank effluent
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 presently being:
transported to downcoast beaches
protein molecules that are organic catalysts
The oldest fossils of life on Earth date back approximately _________ years.
3.5 - 4 billion
Which of these is not one of the four major elements composing life?
The shark (fish), penguin (bird), dolphin (mammal), and ichthyosaur (reptile) all have a similar streamlined torpedo-like shape. This is a good example of:
Photosynthesis and cellular respiration are components of the ________ cycle.
Which of these forms of nitrogen is most abundant but least useful to most living things?
nitrogen gas, N2
DON and DOC are:
molecules dissolved in the ocean
are quite rare, the fossil records indicates that about six have occurred
Among other things, calcium and silicates are used by marine organisms:
as a component of shells and skeletons
Which of these is not part of NASA's definition of life?
It has low entropy.
The open water over the continental shelf is classified as the ________ zone.
The average pH of seawater is approximately:
Compared to seawater, fresh water is:
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.
Organisms that lack the ability to maintain a constant body temperature are:
The main inorganic nutrients needed by marine plants and phytoplankton are:
nitrate and phosphate
Organisms that live on, in, or closely associated with the bottom are called:
Which kingdon is always multicellular, autotrophic and eukaryotic?
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
Organisms that cannot manufacture their own food are called:
Approximately ____ of marine primary production is carried out by phytoplankton.
Generally speaking, about ____ of the energy in any lower trophic level is passed to the next higher level?
Which of these marine communities has the highest annual rate of primary production?
In a light/dark bottle experiment, the compensation depth is where:
total oxygen production in the light bottle is zero
Which of these is never present on seaweeds?
Which of these is primarily found in fresh water?
The spring phytoplankton bloom in temperate oceans is:
triggered by increasing light
Ocean primary production is actively researched for all these reasons except:
its importance in the hydrogen cycle
Mangroves are found:
along muddy tropical shores
During the oxygen revolution, the percentage of atmospheric oxygen increased from:
1% to 20%
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
To date, the best fossils of early marine life have been found in:
Sponges are considered to be the most primitive of animals because they:
have only a few types of cells
Which of these is not a basic chordate characteristic?
Most echinoderms move using their:
water vascular system
The presence of areas of similarly adapted organisms along the shore is called:
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
About _______ of all living and fossil animals are invertebrates.
The swim bladder is an organ associated with:
How many phyla include at least some vertebrate animals?
Which of these groups includes the manta ray?
The most primitive class of fishes is the:
Birds are most closely related to:
The class Osteichthyes is distinguished from other fish groups by its:
Which of these will come ashore to hunt?
Which of these is not a pinnaped?
The marine mammals evolved from land ancestors about _______ years ago.
Which of these includes the largest number of species?
Tapeworms, zooxanthella, and pilot fish each have a________ relationship with another organism.
A ________ is sometimes called the "occupation" of a species in a community.
Calcareous algae are significant members of the _______ community?
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
Which of these is most likely to be euryhaline?
A climax community is the end result of ecological:
Clear patterns of zonation would probably be most obvious in the _______ community.
Animals such as barnacles and corals that live attached to the bottom are called:
Daily vertical migration is most prominent in the:
deep scattering layer
The relationship between anemone fish and sea anemones is:
An abundant metal dissolved in seawater and extracted by chemical and electrical means is:
Which of these is not a method of obtaining fresh water from seawater?
The ____ was fished to the brink of economic extinction in 13 years.
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:
The major mariculture species in the U.S.A. are:
shrimp and lobsters
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?
Acyclovir comes from ____ and is used to treat ____ :
Mare Liberium, the treatise that forms the basis of contemporary laws of the sea, was composed by:
Hugo Grotius in 1604
A nation's exclusive economic zone extends out ___ nautical miles from its shoreline.
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?
Fishermen squirt sodium cyanide over coral reefs to:
stun and collect aquarium fish
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 similar shapes of dolphins, sharks, tunas and penguins is an example of:
Which of these results from the divergence of tectonic plates?
Mid Atlantic Ridge
Which of these is not true of the Gulf Stream?
it is an eastern boundary current
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:
Considering the entire open ocean away from shore, which of these is least variable?
Which of these environments would be considered low-nutrient, high-light, high- productivity?