WORLD OF CELL+MASTERING ACCESS >CUSTOM
9th Edition
ISBN: 9781323445044
Author: Hardin
Publisher: PEARSON C
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Chapter 11, Problem 1Q
In the late 1800s, T. W. Engelmann illuminated algae using a prism to expose the algae to various wavelengths of light in the presence of oxygen-seeking bacteria. In which regions of the spectrum do you think the bacteria were most numerous?
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Chapter 11 Solutions
WORLD OF CELL+MASTERING ACCESS >CUSTOM
Ch. 11 - Both mitochondria and chloroplasts are...Ch. 11 - In the late 1800s, T. W. Engelmann illuminated...Ch. 11 - How do the type and arrangement of the various...Ch. 11 - An essential structural feature in both...Ch. 11 - Prob. 11.4CCCh. 11 - Explain how the Calvin cycle fixes three CO2...Ch. 11 - What are the major regulatory points in the Calvin...Ch. 11 - Although the typical chemical equation for...Ch. 11 - Prob. 11.8CCCh. 11 - True or False Indicate whether each of the...
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- Considering what you know about molds and yeasts, why do you think that we do not use the same nutrient agar used for bacteria to grow yeasts and moldsarrow_forwardWhich of the following is FALSE concerning reasons why bacteria have multiple different types of pigments, such as carotenoids and chlorophylls? Group of answer choices To maximize the amount of light energy harvested. Can help protect from harmful photodynamic reactions To provide a wide range of carbon sources Pigments have narrow ranges of wavelengths they can absorbarrow_forwardThe 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?arrow_forward
- Which of the following statements is correct for bothblue-green algae and bacteria ?(a) Both show anaerobic respiration.(b) Both have chlorophyll pigment.(c) Both are devoid of true nucleus.(d) None of the above Please try to break the solutions into as many steps as practically possible and the steps should come one by one and they should be short and crisp and plagiarism-free.arrow_forwardSoil-based nitrogen-fixing bacteria appear to be highly vulnerable to exposure to UV radiation. Suppose that the ozone level continues to be depleted, what are the long-term effects on the planet?arrow_forwardWe know that a short duration of UV radiation could kill a large number of the cells. We also know that in the Pure Culture lab a very large number of bacteria existed in the soil. (If we had sampled other environments outside in nature, we would have found plenty of bacteria.) Based on these two pieces of information, explain whether bacteria could survive under sunshine? Give a logical reason.arrow_forward
- Cyanobacteria harness energy from the sun through photosynthesis, and oxidize water to provide electrons for energy generation. Thus, we classify cyanobacteria as _________. a. photolithotrophs b. photoautotrophs c. chemolithoautotrophs d. chemo-organotrophsarrow_forwardLuiz Roesch and colleagues conducted a study to determine how many types of bacteria exist in a gram of soil at different locations around the world. They found that soil from agricultural fields harbored considerably fewer species of bacteria than did soil from forests (see Life in a Bacterial World). Propose some possible reasons that agricultural fields might have less bacterial diversity than forests.arrow_forwardSuppose you isolated a bacterial strain that carried out oxygenic photosynthesis. What photosystems would it possess, and what group of bacteria would it most likely belong to?arrow_forward
- In a population of cyanobacteria (Chlorogloeopsis fritschii) in a hot spring in Iceland, some of the bacteria can produce chlorophyll f, while some C. fritschii produce only other types of chlorophylls. Chlorophyll f absorbs light outside of the visible light spectrum, namely near infrared light, allowing the bacteria to absorb light that has not been absorbed or reflected by the water or other organisms. The ability to produce chlorophyll f is heritable, and the bacteria with chlorophyll f can live in low-light environments, such as underneath other organisms, or near the bottom of the light-penetrating zone of the spring. What is the adaptation in this population of C. fritschii living in low-light environments? (Choose one.) a) the ability to produce chlorophyll f b) the ability to produce any type of chlorophyll c) the ability to tolerate the high temperatures of the hot spring d) the ability to survive and reproducearrow_forwardNitrogen and phosphorus added to beaches following an oil spill encourages the growth of natural oil degrading bacteria. Explain why the bacteria do not grow if nitrogen and phosphorus are not added?arrow_forwardMany pelagic Bacteria can use light energy but arenot considered “phototrophs” in the same sense ascyanobacteria or purple bacteria. Explain.arrow_forward
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