OCE chapter 13 Questions with Correct Answers (Grade A+)
Question 1: MA: Of the following nutrients, which is/are used in photosynthetic primary productivity
by phytoplankton? (4) Calcium Silica Phosphates Nitrates Iron Boron
Answer: Silica Phosphates Nitrates Iron
Question 2: T/F: The products of photosynthesis are carbon dioxide (CO2) and water (H2O).
Answer: False
Question 3: T/F: Compensation depth is the depth in the ocean where the photosynthetic rate exceeds
the rate of cellular respiration.
Answer: False
Question 4: T/F: An overabundance of oxygen results in eutrophication.
Answer: False
Question 5: In general, the rate at which energy is stored by organisms through the formation of
organic matter is called: biomass. compensation depth. upwelling. chlorophyll. primary productivity
Answer: primary productivity
Question 6: The depth at which the cellular respiration rate equals the photosynthetic rate is referred
to as the: euphotic zone. calcium compensation depth. productive zone. compensation depth for
photosynthesis. epipelagic depth.
Answer: compensation depth for photosynthesis.
Question 7: A fact regarding photosynthesis is that _________. all carbon-based organisms
photosynthesize nitrogen and sulfuric acid are converted to water and sulfur dioxide photosynthesis is
another term for respiration photosynthesis can occur in the absence of light water and carbon dioxide
are converted to oxygen gas and sugar
Answer: water and carbon dioxide are converted to oxygen gas and sugar
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, Question 8: Mass mortality events of marine mammals and birds may occur after ingesting prey items
that contain algal toxins. What organism that can cause harmful algal blooms should humans be
concerned about if animals in the area are having seizures and exhibiting erratic, "drunken-like"
behavior? diatoms that cause dead zones karenia because it cause red tides gonyaulax because it causes
paralytic shellfish poisoning (PSP) dinoflagellates that cause ciguatera poisoning pseudo-nitzschia,
because it causes amnesic shellfish poisoning
Answer: pseudo-nitzschia, because it causes amnesic shellfish poisoning
Question 9: T/F: The group of marine macroscopic algae with the highest abundance and greatest
geographic distribution belong to the Division Rhodophyta.
Answer: True
Question 10: T/F: Marine algae that grow close to the limits of light penetration have accessory
photosynthetic pigments that absorb high energy, short-wavelength light in the blue region of the
electromagnetic spectrum.
Answer: True
Question 11: The most abundant marine macroscopic algae are members of the Division: Chlorophyta.
Chrysophyta. Bacillariophyta. Phaeophyta. Rhodophyta.
Answer: Rhodophyta.
Question 12: Important marine autotrophs that have silica incorporated into their cell walls are:
coccolithophorids. dinoflagellates. radiolarians. diatoms. cyanobacteria
Answer: diatoms
Question 13: Marine seed-bearing plants include all the following except: mangroves. Spartina
alterniflora. eelgrass. Ulva. surf grass
Answer: Ulva.
Question 14: In dead zones resulting from eutrophication, animal life is absent due to the lack of
_________. carbon dioxide phosphates light nitrates oxygen
Answer: oxygen
Question 15: MA: Of the following types of organisms, which are examples of microscopic algae? (3)
Dinoflagellates Krill photosynthetic bacteria Coccolithophores Diatoms
Answer: Dinoflagellates Coccolithophores Diatoms
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Question 1: MA: Of the following nutrients, which is/are used in photosynthetic primary productivity
by phytoplankton? (4) Calcium Silica Phosphates Nitrates Iron Boron
Answer: Silica Phosphates Nitrates Iron
Question 2: T/F: The products of photosynthesis are carbon dioxide (CO2) and water (H2O).
Answer: False
Question 3: T/F: Compensation depth is the depth in the ocean where the photosynthetic rate exceeds
the rate of cellular respiration.
Answer: False
Question 4: T/F: An overabundance of oxygen results in eutrophication.
Answer: False
Question 5: In general, the rate at which energy is stored by organisms through the formation of
organic matter is called: biomass. compensation depth. upwelling. chlorophyll. primary productivity
Answer: primary productivity
Question 6: The depth at which the cellular respiration rate equals the photosynthetic rate is referred
to as the: euphotic zone. calcium compensation depth. productive zone. compensation depth for
photosynthesis. epipelagic depth.
Answer: compensation depth for photosynthesis.
Question 7: A fact regarding photosynthesis is that _________. all carbon-based organisms
photosynthesize nitrogen and sulfuric acid are converted to water and sulfur dioxide photosynthesis is
another term for respiration photosynthesis can occur in the absence of light water and carbon dioxide
are converted to oxygen gas and sugar
Answer: water and carbon dioxide are converted to oxygen gas and sugar
Page 1
, Question 8: Mass mortality events of marine mammals and birds may occur after ingesting prey items
that contain algal toxins. What organism that can cause harmful algal blooms should humans be
concerned about if animals in the area are having seizures and exhibiting erratic, "drunken-like"
behavior? diatoms that cause dead zones karenia because it cause red tides gonyaulax because it causes
paralytic shellfish poisoning (PSP) dinoflagellates that cause ciguatera poisoning pseudo-nitzschia,
because it causes amnesic shellfish poisoning
Answer: pseudo-nitzschia, because it causes amnesic shellfish poisoning
Question 9: T/F: The group of marine macroscopic algae with the highest abundance and greatest
geographic distribution belong to the Division Rhodophyta.
Answer: True
Question 10: T/F: Marine algae that grow close to the limits of light penetration have accessory
photosynthetic pigments that absorb high energy, short-wavelength light in the blue region of the
electromagnetic spectrum.
Answer: True
Question 11: The most abundant marine macroscopic algae are members of the Division: Chlorophyta.
Chrysophyta. Bacillariophyta. Phaeophyta. Rhodophyta.
Answer: Rhodophyta.
Question 12: Important marine autotrophs that have silica incorporated into their cell walls are:
coccolithophorids. dinoflagellates. radiolarians. diatoms. cyanobacteria
Answer: diatoms
Question 13: Marine seed-bearing plants include all the following except: mangroves. Spartina
alterniflora. eelgrass. Ulva. surf grass
Answer: Ulva.
Question 14: In dead zones resulting from eutrophication, animal life is absent due to the lack of
_________. carbon dioxide phosphates light nitrates oxygen
Answer: oxygen
Question 15: MA: Of the following types of organisms, which are examples of microscopic algae? (3)
Dinoflagellates Krill photosynthetic bacteria Coccolithophores Diatoms
Answer: Dinoflagellates Coccolithophores Diatoms
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