Concept explainers
To explain:
The origin of the eukaryotic photosynthesis if the photosynthetic organelle of a protist is discovered to be most closely related to a different cyanobacterium than the one that gave rise to plastids.
Introduction:
Endosymbiosis is a hypothesis that explains the evolution of the eukaryotic cells like mitochondria in animal and
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Check out a sample textbook solutionChapter 25 Solutions
Campbell Biology in Focus (2nd Edition)
- Q1: Why is photosynthesis called “primary production”? Q2: How does animal life depend on photosynthesis? Q3: Explain how photosynthesis and cellular respiration are “complementary” processes.arrow_forwardMagaia et al. illustrated in Figure 2 the relationship of photosynthetic rate and respiration rate of C3 plants as a function of temperature (2015). Which process hampers the carbohydrate synthesis when the temperature exceeds 30°C? a. Light-dependent reaction b. Light-independent reaction c. Photorespiration d. Photolysis of waterarrow_forwardQ.20 Instructions: -Please answer correctly well explained and not from google internet. -Dont copy paste from Bartley. -The answer has to be understandable and original. C4-type plants seem more suitable than C3-type plants Since they escape photorespiration. Yet there are only 5% of the 260,000 known plant species that are of type C4. Why didn't C4 plants dominate C3 during evolution?arrow_forward
- MAKE CONNECTIONS How do the CO2 moleculesused in photosynthesis reach and enter the chloroplastsinside leaf cells? (See Concept 7.2.)arrow_forwardCan you help me? Thank you- Chloroplasts in eukaryotes are similar to cyanobacteria in that: There can be more than one corect answer. -they likely evolved from a common ancestor -they are both important in decomposing dead plant material -they both use energy from the sun to make sugars for metabolism -they both have genes on located circular chromosomesarrow_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
- Thinking 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_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_forwardNeed help with bio Why is the kingdom Prokaryote more important then the other kingdoms/ MOST important kingdom?arrow_forward
- 1.- a) What is a photon? b) In photosynthesis, light energy is transformed into_____________. 2.- a) What is the granum? b) What is the stroma ? 3.- During photosynthesis a molecular oxygen is released in ________________________________.arrow_forwardQ1: Is chlorophyll found only within chloroplasts? Q2: What could be an advantage of concentrating chlorophyll molecules in the membranes of chloroplasts? Q3: What is the advantage of having multiple chloroplasts per cell?arrow_forwardWHAT 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_forward
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