Oceans
"Red Tides" can be caused by..
dinoflagellates
Which is correct?
gastropod = snail
Evolution and extinction operate hand-in-hand to shape marine ecosystems through time
TRUE
Marine algae are non-vascular plants
TRUE
The sharks, skates, and rays are members of this group:
Chondricthyes
All chordates have a backbone
FALSE
Cnidaria have a central nervous system
FALSE
Enchinoderms possess a vascular system that pumps blood.
FALSE
Primary productivity is markedly higher in warm coastal waters than temperate waters.
FALSE
Seawater is salty because it is evaporated river water.
FALSE
The wings of the "most severely oceanic" birds tend to be ...
long, thin, and pointed
In the gill of a fish, water and blood circulate in _________, which _______ transfer efficiency.
opposite directions, increases
Open ocean environment:
pelagic
Residence time is..
the average length of time an element spends in the ocean
The principle of constant proportions states that..
the ratio or major salts in samples of seawater from various places is a constant
Average salinity of the world ocean is about..
35%
The amount of gas that seawater can hold in solution will be..
be greater in colder water
Organism living on the ocean floor are said to be ______, organisms spending most of their time suspended in the water column are known as _______.
benthic, pelagic
Two valves, shells of glass like substance:
diatoms
___________ marine organisms have an internal temperature very close to that of their surroundings.
ectothermic
The name for the invertebrates that evolved after the snowball glaciations:
ediacaran biota
A physical or biological necessity whose presence in inappropriate amount limits the normal action of an organism is called a ..
limiting factor
Open ocean environment, over the continental shelves:
neritic
The organisms that produce food are called..
primary producers
The zone of lighted ocean in which marine autotrophs tap more energy than they use to stay alive is called..
the euphotic zone
Invertebrates evolved..
after the last of the snowball glaciations
Protozoa are..
both planktic and benthic
Marine mammals...
cetacea, pinipedia, sirenia... ALL
The name of the stinging cells on the tentacles of cnidaria are called..
cnidoblast
The organism that consume autotrophs are called...
heterotrophs
Greatest total oceanic primary productivity occurs...
in the temperate zones
Seawater freezes at a ________ than fresh water.
lower temperature
The main inorganic nutrients necessary for the success of marine autotrophs are..
nitrates and phosphates
The major source of carbon dioxide in seawater is from the...
respiration of marine animals and other organisms
Why does the primary production in temperate regions change seasonally?
the amount of sunlight and wave energy change
The term "salinity" refers to..
the total amount of dissolved solids in the ocean
The most pronounced thermocline exists in the...
tropics