Many of the organisms responsible for toxic red tides and paralytic shellfish poisoning belong to the Division:
A) Bacillariophyta.
B) Chlorophyta.
C) Phaeophyta.
D) Pyrrophyta.
E) Rhodophyta.
Correct Answer:
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Q42: Productivity in polar oceans is:
A)light-limited.
B)nutrient-limited.
C)oxygen-limited.
D)light and nutrient-limited.
E)nutrient
Q43: The percentage of biomass regularly decomposed within
Q44: Nutrient flow in an ecosystem is:
A)bi-directional.
B)cyclical.
C)semi-conservative.
D)top down.
E)unidirectional.
Q45: The efficiency of trophic transfers in ecosystems
Q46: The area of the ocean that produces
Q48: The percentage of euphotic zone biomass that
Q49: Although primary productivity in tropical areas is
Q50: Important marine autotrophs that have silica incorporated
Q51: In temperate oceans of the northern hemisphere
Q52: If 10,000 kilocalories (kcal)of energy were contained
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