Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 28.1, Problem 2CC
WHAT IF? If humans were photoautotrophs, making food by capturing light energy for photosynthesis how might our anatomy be different?
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WHAT IF? The Calvin cycle requires ATP and NADPH,products of the light reactions. If a classmate assertedthat the light reactions don’t depend on the Calvin cycleand, with continual light, could just keep on producingATP and NADPH, how would you respond?
WHAT IF? Some nighttime partygoers wear glow-inthe-dark necklaces. The necklaces start glowing oncethey are “activated” by snapping the necklace in a waythat allows two chemicals to react and emit light in theform of chemiluminescence. Is the chemical reactionexergonic or endergonic? Explain your answer.
MAKE CONNECTIONS Can plants use the sugar they produce during photosynthesis to directly power the work ofthe cell? Explain. (See Figures 8.10, 8.11, and 9.6.).
Chapter 28 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 28.1 - Prob. 1CCCh. 28.1 - WHAT IF? If humans were photoautotrophs, making...Ch. 28.1 - Prob. 3CCCh. 28.2 - Prob. 1CCCh. 28.2 - Prob. 2CCCh. 28.2 - Prob. 3CCCh. 28.3 - Prob. 1CCCh. 28.3 - Prob. 2CCCh. 28.3 - Prob. 3CCCh. 28.4 - A sign is hammered into a tree 2 m from the trees...
Ch. 28.4 - Would you expect a tropical tree to have distinct...Ch. 28.4 - Prob. 3CCCh. 28 - Most of the growth of a plant body is the result...Ch. 28 - Prob. 2TYUCh. 28 - Heartwood and sapwood consist of A. bark. B....Ch. 28 - Prob. 4TYUCh. 28 - Which of the following would not be seen in a...Ch. 28 - Prob. 6TYUCh. 28 - SCIENTIFIC INQUIRY Grasslands typically do not...Ch. 28 - Prob. 8TYUCh. 28 - FOCUS ON ORGANIZATION In a short essay (100-150...Ch. 28 - SYNTHESIZE YOUR KNOWLEDGE This stained light...
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- How are the NADPH and GA3P molecules made during photosynthesis similar? They are both end products of photosynthesis They are both substrates for photosynthesis They are both produced from carbon dioxide They both store energy in chemical bonds.arrow_forwardEVOLUTION CONNECTION Photorespiration can decreasesoybeans’ photosynthetic output by about 50%. Would youexpect this figure to be higher or lower in wild relatives ofsoybeans? Why?arrow_forwardWhat two main products result from photosynthesis? oxygen and carbon dioxide chlorophyll and oxygen sugars/carbohydrates and oxygen sugars/carbohyd rates and carbon dioxidearrow_forward
- Introduction The major context for this lab is photosynthesis, and the overall equation for photosynthesis is: 12 H2O + 6 CO2+ light energy → C6H12O6+ 6O2+ 6 H2O Exercise A: Photosynthetic Pigments Watch the following two videos about plant pigments and chromatography. To analyze the data we’ll give you, you’ll need to understand what types of pigments are found in a leaf, and understand some general characteristics of those pigments. Photosynthetic Pigments (~3 min) link: https://www.youtube.com/watch?v=dwz3qozDiyI Leaf Color Chromatography (~4.5 min) link: https://www.youtube.com/watch?v=qH-AJDqsSII Answer the below questions : Define the following terms: photosynthesis chromatography absorption spectrum action spectrum chlorophylls carotenoids (carotene and xanthophyll) Referring to the Photosynthetic Pigments video, in the table below, write in the peak wavelength ranges absorbed by each of the following pigments. Include the colors that are associated with those…arrow_forwardMAKE CONNECTIONS How do the CO2 moleculesused in photosynthesis reach and enter the chloroplastsinside leaf cells? (See Concept 7.2.)arrow_forwardTags: photosynthesis, plants, biology, chemistry, biochemistry Consider a recently discovered planet that scientists believe is capable of supporting life due to its similarities to the earth. However, its daytime temperature and oxygen content in its atmosphere are HIGHER than earth. Design a plant that can survive and show MAXIMUM photosynthetic efficiency in this planet by enumerating the features (anatomical/metabolic) that you will include and explain why it is necessary to include them.arrow_forward
- Science reflection: Where can we use the knowledge about photosynthesis in real life setting?arrow_forwardQ no 2: Describe in detail what happens during the light reactions of photosystems. Use terms such as photosystems (be specific about which is which), pigments, reaction center, water-splitting, NADPH, ATP, ADP, NADP+, oxygen gas, etc?arrow_forwardThinking Critically What factors limit productivity? What methods have marine producers evolved to cope with the lack of red light needed by chlorophyll for photosynthesis?arrow_forward
- For photosynthesis lab in biology 1) This lab uses spinach leaves. Name another plant that would make an interesting comparison to spinach. Explain why you think this leaf would provide an interesting comparison 2) The lights used in this experiment are 60W. What would you predict the effect of having stronger or weaker wattage bulbs would be on your results? Explain. 3)This lab uses 0.2% sodium bicarbonate. What would you predict the effect of raising or lowering the percentage would be on your results? Explain. 4)What are TWO other things that might be manipulated in an experiment using this same protocol other than the type of leaf, percent sodium bicarbonate, and wattage of light bulb? 5) What key thing do you have to look for on the graph to know for certain that your treatment has caused a significant effect?arrow_forwardWHAT IF? A classmate proposes that mitochondria andchloroplasts should be classified in the endomembranesystem. Argue against the proposal.arrow_forward21 . What is the overall outcome of the light reactions in photosynthesis? 22 . Why are carnivores, such as lions, dependent on photosynthesis to survive? 23 . Why are energy carriers thought of as either “full” or “empty”? 24 . Describe how the grey wolf population would be impacted by a volcanic eruption that spewed a dense ash cloud that blocked sunlight in a section of Yellowstone National Park. 25 . How does the closing of the stomata limit photosynthesis? 26 . Describe the pathway of electron transfer from photosystem II to photosystem I in light-dependent reactions. 27 . What are the roles of ATP and NADPH in photosynthesis? 29 . Why is the third stage of the Calvin cycle called the regeneration stage? 32 . Imagine a sealed terrarium containing a plant and a beetle. How does each organism provide resources for the other? Could each organism survive if it was the only living thing in the terrarium? Why or why not?arrow_forward
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