11.What most likely causes the trends in oxygen concentration shown in the graph below?a.The water becomes colder at night and thus holds more oxygen.b.Respiration in most organisms increases at night.c.More organisms are respiring at night than during the day.d.Photosynthesis produces more oxygen than is consumed by respiration during theday. Show
12.The chemical reaction for photosynthesis is6 CO2+ 12 H2O + light energy C6H12O6+ 6 O2+ 6 H2OIf the input water is labeled with a radioactive isotope of oxygen, 18O, then the oxygengas released as the reaction proceeds is also labeled with 18O. Which of the following isthe most likely explanation? Get answer to your question and much more 13.Students in a class measured the mass of various living organisms. They then kept theorganisms in thedark for 24 hours before remeasuring them. None of the organisms wereprovided with nutrients during the24-hour period. The data are as follows.OrganismStarting Mass(g)Final Mass(g)Elodea(submergedaquatic plant)15.1014.01Goldfish10.109.84Sea anemone25.6024.98Which of the following is the best explanation for the pattern of change in mass of theorganisms over time?Created by: @apbiopenguins31 AP Biology Exam ReviewCreated by: @apbiopenguins5612.The chemical reaction for photosynthesis is6 CO2+ 12 H2O + light energyC6H12O6+ 6 O2+ 6 H2OIf the input water is labeled with a radioactive isotope of oxygen, 18O, then the oxygen gas released as thereaction proceeds is also labeled with 18O. Which of the following is the most likely explanation?a.During the light reactions of photosynthesis, water is split, the hydrogen atoms combine with the CO2,and oxygen gas is released.b.During the light reactions of photosynthesis, water is split, removing electrons and protons, and oxygengas is released.c.During the Calvin cycle, water is split, regenerating NADPH from NADP+, and oxygen gas is released.d.During the Calvin cycle, water is split, the hydrogen atoms are added to intermediates of sugarsynthesis, and oxygen gas is released.13.Students in a class measured the mass of various living organisms. They then kept the organisms in thedarkfor 24 hours before remeasuring them. None of the organisms were provided with nutrients during the24-hourperiod. The data are as follows.OrganismStarting Mass (g)Final Mass (g)Elodea(submergedaquatic plant)15.1014.01Goldfish10.109.84Sea anemone25.6024.98Which of the following is the best explanation for the pattern of change in mass of the organisms over time?a.Water loss due to evaporationb.Cellular respirationc.The law of conservation of matterd.Growth and reproductionUse the following information to answer questions 14 & 15:An experiment to measure the rate of respiration in crickets and mice at 10°C and 25°C was performed using arespirometer, an apparatus that measures changes in gas volume. Respiration was measured in mL of O2consumed per gram of organism over several five-minute trials and the following data were obtained.OrganismTemperature (°C)Average respiration(mL O2/g/min)Mouse100.0518Mouse250.0321Cricket100.0013Cricket250.003814.During aerobic cellular respiration, oxygen gas is consumed at the same rate as carbon dioxide gas is produced.In order to provide accurate volumetric measurements of oxygen gas consumption, the experimental setupshould include which of the following?a.A substance that removes carbon dioxide gasb.A plant to produce oxygenc.A glucose reserved.A valve to release excess water How will the pH of the co2 of the indicator solution change if the cells begin to respire?As a result of this decrease, less carbonic acid dissociates, decreasing the amount hydrogen ions, thus the pH is increased. However, as the cells respire, the concentration of carbon dioxide is increases. The increase allows for more carbonic acid to dissociate the H protons decreasing the pH level.
What is the process in which carbon from co2 is incorporated into organic molecules?Carbon from carbon dioxide—inorganic carbon—can be incorporated into organic molecules; this process is called carbon fixation, and the carbon in organic molecules is also known as fixed carbon.
What is the role of an alkaline solution in the Respirometer?A small volume of potassium hydroxide solution (KOH) in the respirometer will remove the carbon dioxide as it is being generated during respiration.
Which of the following best describes the role of water in photosynthesis?Which of the following best describes the role of water in photosynthesis? Water molecules donate electrons to the electron transport chain.
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What most likely causes the trends in oxygen concentration shown in the graph above?
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