Chapter 13 Part A The products of photosynthesis are carbon dioxide CO2 and water H2O ANSWER False False Incorrect correct answer displayed Chapter 13 Question 18 Part A Compensation depth is the depth in the ocean where the photosynthetic rate exceeds the rate of cellular respiration ANSWER Part A Tropical open ocean waters have the highest rate of primary productivity in the world s oceans ANSWER Correct Chapter 13 Question 20 False Correct Chapter 13 Question 36 Part A In primary production ANSWER there is a net gain in organic carbon by organisms Incorrect correct answer displayed Chapter 13 Question 38 Part A In general the rate at which energy is stored by organisms through the formation of organic matter is called ANSWER Primary productivity Incorrect correct answer displayed Chapter 13 Question 40 Part A The depth at which the cellular respiration rate equals the photosynthetic rate is referred to as the ANSWER compensation depth for photosynthesis Incorrect correct answer displayed Chapter 13 Reading Quiz Question 2 Part A The color of light most readily absorbed by water is Hint 1 Absorption increases across the spectrum ANSWER red Incorrect correct answer displayed Red light is completely absorbed when a depth of about 10 meters is reached Chapter 13 Concept Check Question 2 Part A 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 Hint 1 Each algal toxin produces a unique set of symptoms in humans and other animals ANSWER pseudo nitzschia because it causes amnesic shellfish poisoning Incorrect correct answer displayed Correct Seizures are a common symptom in humans and marine life that are exposed to the toxin domoic acid produced by certain species of diatoms in this genus Chapter 13 Question 22 Part A The group of marine macroscopic algae with the highest abundance and greatest geographic distribution belong to the Division Rhodophyta ANSWER True Incorrect correct answer displayed Chapter 13 Question 24 Part A Diatoms are classified as members of the Division Chlorophyta ANSWER False Incorrect correct answer displayed Chapter 13 Question 42 Part A Diatoms important producers in the epipelagic open ocean are members of the Division ANSWER Chrysophyta Incorrect correct answer displayed Chapter 13 Question 44 Part A Important marine autotrophs that have silica incorporated into their cell walls are ANSWER diatoms Incorrect correct answer displayed Chapter 13 Question 66 Part A Examine the five words and or phrases and determine the relationship among the majority of words phrases Please identify the word and or phrase that does NOT fit the pattern Enter only the letter of the answer caps no period and not the full entry in the field below ANSWER C Incorrect correct answer displayed Chapter 13 Reading Quiz Question 4 Part A In dead zones resulting from eutrophication animal life is absent due to the lack of Hint 1 Consider what is vital for animal life to survive ANSWER oxygen Incorrect correct answer displayed Oxygen is depleted by the oxidation decay of the excess organic matter produced by eutrophication Chapter 13 Understanding the Concepts 2 Part A Of the following types of organisms which are examples of microscopic algae Hint 1 Examples of microscopic algae include organisms that build their tiny tests of silica calcite or cellulose See Figure 13 10 ANSWER Coccolithophores Diatoms Dinoflagellates Incorrect correct answer displayed Photosynthetic bacteria are not a type of algae Chapter 13 Question 26 Part A Primary productivity in temperate marine systems is limited solely by the amount of available solar radiation ANSWER False Correct Chapter 13 Question 28 Part A Equatorial upwelling decreases primary productivity in tropical waters ANSWER False Incorrect correct answer displayed Chapter 13 Question 46 Part A The percentage of biomass regularly decomposed within the euphotic zone is about ANSWER 90 Incorrect correct answer displayed Chapter 13 Question 48 Part A The relative productivity in the world s oceans from most productive to least productive is ANSWER temperate waters polar waters tropical waters Incorrect correct answer displayed Chapter 13 Question 50 Part A Productivity in polar oceans is ANSWER light limited Incorrect correct answer displayed Chapter 13 Question 52 Part A Although primary productivity in tropical areas is generally low which of the following tropical locations have unusually high primary productivity rates Check all that apply ANSWER All the above tropical areas have relatively high primary productivity Incorrect correct answer displayed Chapter 13 Question 54 Part A In temperate oceans of the northern hemisphere during the summer months ANSWER nutrient concentrations are low solar input is high and dissolved oxygen decreases Incorrect correct answer displayed Chapter 13 Reading Quiz Question 6 Part A Summer productivity in temperate waters typically is hampered by Hint 1 This is usually absent in winter ANSWER a strong thermocline Incorrect correct answer displayed The thermocline develops when surface waters are heated and tends to inhibit vertical mixing and upwelling This reduces the input of nutrients that fuel productivity Chapter 13 Understanding the Concepts 4 Part A Of the following statements about oceanic productivity in polar regions which is are true Hint 1 Think of the conditions that limit productivity in polar high latitude regions See Figure 13 18 ANSWER In polar oceans nutrient concentrations are usually adequate and do NOT limit productivity In polar oceans productivity is limited by the lack of sunlight in the winter In polar oceans there is incredibly high productivity in the summertime Incorrect correct answer displayed Chapter 13 Understanding the Concepts 6 Part A Of the following statements about oceanic productivity which is are true Hint 1 Consider the conditions that limit oceanic productivity See Figures 13 20 and 13 21 ANSWER In tropical oceans productivity is limited year round by the lack of nutrients In middle latitude oceans the fall bloom is limited by the lack of sunlight In middle latitude oceans the spring bloom is limited by the lack of nutrients Incorrect correct answer displayed In tropical oceans productivity is limited year round by the lack of nutrients Give
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