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 24.4, Problem 2CC
WHAT IF? What would the discovery of a bacterial species that is a methanogen imply about the evolution of the methane-producing pathway?
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WHAT IF? The main product of fossil fuel combustion is CO2 , and thisis the source of the increase in atmospheric CO2 concentration. Scientistshave proposed strategically situating containers of these algae near industrialplants or near highly congested city streets. Considering the process ofphotosynthesis, how does this arrangement make sense?
MAKE CONNECTIONS As noted in Figure 52.15, theaddition of nutrients to a lake can cause an algal bloom.When these algae die, complex molecules in their bodiesare broken down by decomposers using aerobic respiration. Explain why this would reduce the lake’s oxygenlevels (see Concept 9.1)
Q1: What are three ways that carbon is released into the atmosphere? Q2: Are all of the pathways you listed for question 1 affected by human activity?
Chapter 24 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 24.1 - What hypothesis did Miller test in his classic...Ch. 24.1 - How would the appearance of protocells have...Ch. 24.1 - Prob. 3CCCh. 24.1 - Prob. 4CCCh. 24.2 - Contrast the cellular and DNA structures of...Ch. 24.2 - Distinguish between the four major modes of...Ch. 24.2 - Prob. 3CCCh. 24.2 - Prob. 4CCCh. 24.3 - Although rare on a per gene basis, new mutations...Ch. 24.3 - Distinguish between the three mechanisms by which...
Ch. 24.3 - In a rapidly changing environment, which bacterial...Ch. 24.3 - WHAT IF? If a nonpathogenic bacterium were to...Ch. 24.4 - Explain how molecular systematics and metagenomics...Ch. 24.4 - WHAT IF? What would the discovery of a bacterial...Ch. 24.5 - Explain how prokaryotes, though small, can be...Ch. 24.5 - Prob. 2CCCh. 24.5 - Prob. 3CCCh. 24.5 - Prob. 4CCCh. 24 - Which of the following steps has not yet been...Ch. 24 - Fossilized stromatolites A. more than 2.8 billion...Ch. 24 - Prob. 3TYUCh. 24 - Photoautotrophs use A. light as an energy source...Ch. 24 - Which of the following statements is not true? A....Ch. 24 - Prob. 6TYUCh. 24 - Plantlike photosynthesis that releases O2 occurs...Ch. 24 - SCIENTIFIC INQUIRY INTERPRET THE DATA The...Ch. 24 - FOCUS ON EVOLUTION In patients infected with...Ch. 24 - FOCUS ON ENERGY AND MATTER In a short essay (about...Ch. 24 - Prob. 11TYU
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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?arrow_forwardWHAT IF? If the following redox reaction occurred,which compound would be oxidized? Reduced?c4h6o5 + nAD+ S c4h4o5 + nADh + h+arrow_forwardMAKE CONNECTIONS Review the discussion of feedback regulation in Concept 1.1. Could effects of globalwarming on peatlands alter CO2 concentrations in waysthat result in negative or positive feedback? Explain.arrow_forward
- MAKE CONNECTIONS Refer to the discussion of oceanacidification in Concept 3.3. Ocean acidification andchanges in the distribution of C3 and C4 plants may seemto be two very different problems, but what do theyhave in common? Explain.arrow_forward. WHAT IF? You are studying nitrogen cycling on theSerengeti Plain in Africa. During your experiment, a herdof migrating wildebeests grazes through your study plot.What would you need to know to measure their effecton nitrogen balance in the plot?arrow_forwardQ1: What are the products of cellular respiration? Q2: Considering the inputs and products of each process, why is cellular respiration considered the reciprocal process to photosynthesis? Q3: Which of the three stages of cellular respiration—glycolysis, the Krebs cycle, or oxidative phosphorylation—could organisms have used 4 billion years ago, before photosynthesis by cyanobacteria released oxygen into the atmosphere?arrow_forward
- WHAT IF? In the absence of O2, as in question 1, whatdo you think would happen if you decreased the pH ofthe intermembrane space of the mitochondrion? Explainyour answerarrow_forwardWHAT IF? Predict how the results would change if water samples weredrawn from areas where new duck farms had greatly increased the amountof pollution in the water. Explain.arrow_forward3. How does oxidative phosphorylation differ from substrate-level phosphorylation? 4. Why must autotrophic organisms also respire or ferment in addition to fixing CO2?arrow_forward
- How do chlorofluorcarbons and hydrochlorofluorcarbon effects human heath in climate change? How can we reduce of chlorofluorcarbons and hydrochlorofluorcarbon in our enviroment to improve climate change?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_forwardAlthough chemoautotrophs serve as the primary producers near hydrothermal vents, animals there still ultimately depend on the photosynthetic activities of plants and cyanobacteria. Why?arrow_forward
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