A student is conducting an investigation about the relationship between photosynthesis and respiration. The student places a small green plant in a sealed container and measures the amount of CO2 and O2 gas in the container. For the first three days of the investigation, the student shines a light on the container and discovers that the O2 concentration increases significantly. Then the student places the container in a dark closet and notices that the O2 concentration decreases but that the CO2 concentration increases. Which of the following best explains why the student notices the change in oxygen concentration when the plant is placed in the dark closet?
A. The plant used the oxygen in the container to perform photosynthesis.
B. The plant production of carbon dioxide displaced the oxygen gas in the container.
C. The plant consumed the oxygen present in the container as a part of performing cell respiration.
D. The student did not seal the container properly so the gas concentrations are unbalanced.
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What was Engelman's reasoning for the bacteria congregating in the regions containing the red and violet light?
A. The levels of CO2 increased in the regions containing red and violet light, and the bacteria were attracted to the CO2.
B. Red and violet light evaporate water at a faster rate so the bacteria traveled to these regions to prevent drowning.
C. Red and violet light absorb more heat than the green, yellow, and orange lights enabling the bacteria to remain warm.
D. Photosynthesis increased levels of O2 in the regions containing red and violet light, and the bacteria were attracted to the O2.
The purpose of cellular respiration is to produce ATP from stored energy in glucose. All of the following will generate ATP except
A. glycolysis.
B. Krebs cycle.
Calvin cycle.
D. the mitochondrial and cytoplasmic's biochemical pathways.
According to the data, the crabs at 23.5oC have greater oxygen consumption than at 8.5oC. This is most likely explained by which of the following statements?
A. The crabs at 8.5oC have a higher rate of respiration so less oxygen is consumed.
B. The crabs at 23.5oC have a lower metabolic rate than the crabs at 8.5o
Crabs use their surroundings to warm their internal temperature; once warm, their metabolic rate increased.
D. Because crabs are cold blooded, they use their oxygen to increase their body temperature resulting in a lower respiration rate at 8.5o
During the cellular respiration experiment, soda lime was placed in the respiration chamber. What is the purpose of the soda lime?
As oxygen is consumed, carbon dioxide is released by the animal. Soda lime removed the CO2 so that the amount of oxygen used can be measured.
B. Soda lime is necessary for the animals to produce ATP during cellular respiration. Without the ATP, the oxygen consumed could not be measured.
C. Glucose is the reactant that starts cellular respiration. Soda lime provides the carbon found in glucose.
D. Soda lime acts as an integral protein allowing the oxygen to pass through the cell membrane so that it can be measured.
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