Plankton are:
a. marine organisms that drift or swim weakly.
b. microscopic marine plants.
c. marine organisms that swim.
d. composed ONLY of microscopic marine organisms. correct answers a. marine organisms that drift or swim weakly.
Phytoplankton are:
a. residents primarily of the di...
OCEANOGRAPHY EXAM #4 || VERY FLAWLESS.
Plankton are:
a. marine organisms that drift or swim weakly.
b. microscopic marine plants.
c. marine organisms that swim.
d. composed ONLY of microscopic marine organisms. correct answers a. marine organisms that
drift or swim weakly.
Phytoplankton are:
a. residents primarily of the disphotic zone.
b. less important to the productivity of the ocean than seaweeds.
c. heterotrophs.
d. the base of the marine food web. correct answers d. the base of the marine food web.
The Pacific's giant kelp forests consist mostly of:
a. red algae.
b. mangroves.
c. salt marshes.
d. macrocystis. correct answers d. macrocystis.
Productivity in the tropics is:
a. low, due to a lack of nutrients.
b. average, due to abundant sunshine and clear waters.
c. high, due to abundant sunshine, warm temperatures, and clear waters.
d. average, due to warm temperatures. correct answers a. low, due to a lack of nutrients.
Productivity in the summer in the polar regions is:
a. high, due to abundant sunshine and nutrient-rich waters.
b. high, due to abundant sunshine, warm temperatures, and clear waters.
c. average, due to abundant sunshine and clear waters.
d. low, due to a lack of nutrients. correct answers a. high, due to abundant sunshine and nutrient-
rich waters.
Red tides are caused by dinoflagellates.
True
False correct answers True
Typical plankton productivity in the temperate zone is about 130 gC/m2/yr.
True
False correct answers False, 30 gC/m2/yr.
The largest marine animals, such as the baleen whales, eat top consumers, such as seals and large
fish.
True
False correct answers False, they eat krill and plankton
, The most abundant zooplankton are copepods.
True
False correct answers True
A physical or biological necessity whose presence in inappropriate amounts limits the normal
action of an organism is called a biological factor.
True
False correct answers False, it's a limiting factor
Gas bladders help seaweeds:
a. photosynthesize nutrients.
b. keep their upper portions near the surface.
c. reproduce.
d. hold tight to the seafloor. correct answers b. keep their upper portions near the surface.
Brown algae are known as the ________.
a. chlorophyta
b. rhodophyta
c. phaeophyta
d. slime molds correct answers c. phaeophyta
The most productive region in an ocean is the ________.
a. polar open ocean
b. nearshore
c. temperate open ocean
d. tropical open ocean correct answers b. nearshore
The northern temperate zone has two peaks for phytoplankton productivity in:
a. early summer and late summer.
b. winter and spring.
c. winter and summer.
d. spring and fall. correct answers d. spring and fall.
Animals that have a planktonic lifestyle for only part of their lives are called ________.
a. holoplankton
b. meroplankton
c. macroplankton
d. zooplankton correct answers b. meroplankton
Which of the following is NOT true about echolocation?
a. It is used to locate prey.
b. It is not used to see obstacles.
c. It uses reflected sound.
d. It can stun, debilitate, or even kill prey. correct answers b. It is not used to see obstacles.
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