Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Textbook Question
Chapter 5, Problem 6WIO
Over the past decades, the CO2 concentration in the atmosphere has increased. (a) Predict the effect of increasing carbon dioxide concentrations on photorespiration. (b) Scientists suggest that increasing CO2 concentrations are leading to higher average global temperatures. If temperatures are increasing, does this change your answer to part (a)?
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If a photosynthetic organism is illuminated in a closed, sealed environment,it is observed that the CO2 and O2 levels in the surrounding atmospherereach a constant ratio.(a) Suggest an explanation.(b) What factor would you think primarily determines the value of this ratio?
If a photosynthetic organism is illuminated in a closed, sealed envi-
ronment, it is observed that the CO, and O, levels in the surround-
ing atmosphere reach a constant ratio.
(a) Suggest an explanation.
(b) What factor would you think primarily determines the value of
this ratio?
(a) It can be argued that, if life were to exist elsewhere in the universe, it would require some process like photosynthesis. Why is this argument reasonable? (b) If the starship Enterprise were to land on a distant planet and find no measurable oxygen in the atmosphere, could the crew conclude that photosynthesis is not taking place?
Chapter 5 Solutions
Biology: Concepts and Investigations
Ch. 5.1 - Prob. 1MCCh. 5.1 - Prob. 2MCCh. 5.1 - Prob. 3MCCh. 5.1 - Prob. 4MCCh. 5.1 - How did the origin of photosynthesis alter Earths...Ch. 5.2 - Prob. 1MCCh. 5.2 - Prob. 2MCCh. 5.2 - Prob. 3MCCh. 5.2 - How does the reaction center chlorophyll interact...Ch. 5.3 - Prob. 1MC
Ch. 5.3 - Prob. 2MCCh. 5.4 - Prob. 1MCCh. 5.4 - Prob. 2MCCh. 5.4 - Prob. 3MCCh. 5.4 - Prob. 4MCCh. 5.5 - What is the relationship between the light...Ch. 5.5 - Prob. 2MCCh. 5.6 - Why is the Calvin cycle also called the C3...Ch. 5.6 - Prob. 2MCCh. 5.6 - What conditions maximize photorespiration?Ch. 5.6 - Prob. 4MCCh. 5.6 - Prob. 5MCCh. 5.7 - Prob. 1MCCh. 5.7 - Prob. 2MCCh. 5 - Where does the energy come from to drive...Ch. 5 - Prob. 2MCQCh. 5 - Prob. 3MCQCh. 5 - The evolution of photosynthesis resulted in a. an...Ch. 5 - Prob. 5MCQCh. 5 - Prob. 6MCQCh. 5 - Prob. 7MCQCh. 5 - Imagine that multiple simultaneous volcanic...Ch. 5 - Prob. 2WIOCh. 5 - Prob. 3WIOCh. 5 - Would a plant grow belier in a room painted blue...Ch. 5 - Determine whether each of the following molecules...Ch. 5 - Over the past decades, the CO2 concentration in...Ch. 5 - How does photosynthesis help compensate for...Ch. 5 - How is the CAM pathway adaptive in a desert...Ch. 5 - Explain how C4 photosynthesis is based on a...Ch. 5 - Prob. 1PITCh. 5 - 2. How would you incorporate the Calvin cycle,...Ch. 5 - Prob. 3PITCh. 5 - Prob. 4PIT
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- Which one of the following is ordinarily not an air pollutant ? (A) CO2 (B) CO (C) SO2 (D) Hydrocarbonarrow_forward. Photorespiration ________. A) generates carbon dioxide and consumes ATP and oxygen B) generates ATP and sugars and consumes oxygen and carbon dioxide C) generates oxygen and consumes ATP, carbon dioxide, and sugars D) consumes carbon dioxide and generates ATP, sugars, and oxygenarrow_forwardWhy is it important the concentration of CO2 in the atmosphere?arrow_forward
- (a) Distinguish between photodissociation and photoionization.(b) Use the energy requirements of these two processesto explain why photodissociation of oxygen is moreimportant than photoionization of oxygen at altitudesbelow about 90 km.arrow_forwardWhat will happen, if there was no CO2 in the earth's atmosphere?arrow_forwardA) Briefly explain what oxygen is? B) Is the surplus of oxygen in our atmosphere a requirement for life, or a product of life? provide 3 points of evidence with explanation of each pointarrow_forward
- Why do you think exposure to ozone causesmore serious respiratory problems in youngerand older persons than in healthy adults?arrow_forwardBackground: One of the main drivers of climate change is the emissions of carbon dioxide gas into the atmosphere from the burning of fossil fuels. This has altered the global carbon cycle. using the link below to watch https://youtu.be/xk11DVaAjEA PROMPT: 1) What role does photosynthesis paly in the global carbon cycle? 2) What are fossil fuels and how are they altering the global carbon cycle? 3. Learn about carbon sequestration. Briefly explain what it is and how it can help to mitigate the impacts of climate change. Post a link an example of where/how this is being implemented.arrow_forwardHow will the increase in atmospheric CO2 impact photosynthesis? How will this impact life on earth (Human or otherwise)?arrow_forward
- Which one is not a pollutant normally? (a) hydrocarbon (b) carbon dioxide (c) carbon monoxide (d) sulphur dioxide.arrow_forwardDoes a positive change in carbon dioxide per minute indicate photosynthesis or cellular respiration?arrow_forwardRemoval of the source of CO2 from photosynthesizing chloroplasts results in rapid changes in the concentration of certain chemicals. Which one of the following represents the correct combination of concentration changes?.arrow_forward
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