Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 27.3, Problem 3CC
WHAT IF? Ø Describe what you might eat for a typical meal if humans, like cyanobacteria, could fix nitrogen.
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Why is energy required for nutrient transport? Give an example of a system that transports nutrients and describe what source of energy is used to move the nutrients into the cell.
Why can’t most organisms use the nitrogen gas that is so prevalent in the atmosphere? How do these organisms acquire a usable form of nitrogen?
The bacteria which oxidize various inorganic substancesand use the released energy for the synthesis of food arecalled _______________.(a) Archaebacteria(b) Heterotrophic bacteria(c) Photosynthetic autotrophic bacteria(d) Chemosynthetic autotrophic bacteria
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Chapter 27 Solutions
Campbell Biology
Ch. 27.1 - Describe two adaptations that enable prokaryotes...Ch. 27.1 - Contrast the cellular and DNA structures of...Ch. 27.1 - Prob. 3CCCh. 27.2 - Although rare on a per gene basis, new mutations...Ch. 27.2 - Distinguish between the three mechanisms by which...Ch. 27.2 - In a rapidly changing environment, which bacterial...Ch. 27.3 - Distinguish between the four major modes of...Ch. 27.3 - A bacterium requires only the amino acid...Ch. 27.3 - WHAT IF? Describe what you might eat for a...Ch. 27.4 - Explain how molecular systematics and metagenomics...
Ch. 27.4 - Prob. 2CCCh. 27.5 - Explain how prokaryotes, though small, can be...Ch. 27.5 - MAKE CONNECTIONS Review Figure 10.6. Then...Ch. 27.6 - Identify at least two ways that prokaryotes have...Ch. 27.6 - Prob. 2CCCh. 27.6 - Prob. 3CCCh. 27 - Describe features of prokaryotes that enable them...Ch. 27 - Mutations are rare and prokaryotes reproduce...Ch. 27 - Describe the range of prokaryotic metabolic...Ch. 27 - How have molecular data informed prokaryotic...Ch. 27 - In what ways are prokaryotes key to the survivaI...Ch. 27 - Prob. 27.6CRCh. 27 - Genetic variation in bacterial populations cannot...Ch. 27 - Photoautotrophs use (A) light as an energy source...Ch. 27 - Which of the following statements is not true? (A)...Ch. 27 - Prob. 4TYUCh. 27 - Prob. 5TYUCh. 27 - Prob. 6TYUCh. 27 - Prob. 7TYUCh. 27 - SCIENTIFIC INQUIRY INTERPRET THE DATA The...Ch. 27 - WRITE ABOUT A THEME: ENERGY In a short essay...Ch. 27 - SYNTHESIZE YOUR KNOWLEDGE Explain how the small...
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- The process whereby nitrogen is brought into organic molecules is called.___________ nitrification denitrification nitrogen fixation nitrogen cyclingarrow_forwardWhich of the following elements is NOT essential (a.k.a., macronutrients) for all bacteria? Nitrogen (N) O Hydrogen (H) Iron (Fe) Carbon (C)arrow_forwardA- Name 5 organisms that can carry out nitrification. B- Write the chemical reaction. C- What enzyme carries out the process? Briefly explain how it works.arrow_forward
- atom2 Laura picks some soil near a factory and finds the soil to be very acidic. She checks the pH and finds it to 2 She takes this soil and Streaks it in a nutrient agar plate and finds some growth. Answer the following questions based on the above information a. If pH is 2 what is the (H+]in this soil b. Which domain will you put these organisms in? c Are they Prokaryotes or Eukaryotes? d. Do thev have DNA 3.arrow_forwardThink about the conditions (temperature, light, pressure, and organic and inorganic materials) that you may find in a deep-sea hydrothermal vent. What type of prokaryotes, in terms of their metabolic needs (autotrophs, phototrophs, chemotrophs, etc.), would you expect to find there?arrow_forwardCan someone please help me with 3 multiple choice question, please choose the best that fits, Thank you 1) Most of the nitrogen on earth is contained in nitrogen gas in the atmosphere, which of the following orgnisms convert nitrogen to a form accessible to the rest of the biological community ? A)fungi B)nitrogen fixing prokaryotes C) plants D) nitrogen fixing protists 2)if a meteor impact or volcanic eruption injected a lot of dust into the atmosphere and significantly reduced the sunlight reaching Earth's surface for one year, which of the following marine communitites would be least affected? A)coral reef B)estuary C) intertidal D) deep -sea-vent E) wetlands 3)In terrestrial biomes, which factor is dependent on all the others? A)mineral nutrient availability B)annual average precipitation C) soil structure D)the specific plant and animal species E) light availabilityarrow_forward
- 6) When the chemical bonds of biofuels are broken, they can release large amounts of energy that can be used to power machines. True or False? 7) Where do humans/animals and plants obtain energy from? 8) What are autotrophs/heterotrophs? Are humans autotroph or heterotroph? How about plants? 9) Plants can produce their own food. They can produce sugars which can be used as building blocks to synthesize (manufacture) more complex molecules or cell structures. True or False? 10) Name examples of photosynthetic organisms. 11) Where does photosynthesis happen (which organelles)? 12) Which molecule is implicated in photosynthesis and where is it located? Which of the following wavelengths can this molecule absorb? blue, red, green. 13) Why do we perceive the leaves of a plant 14) Photosynthesis has two parts. Name the events that happen in each of them. green? 15) Plants release oxygen. Does this happen in the "photo" or “synthesis" part of photosynthesis? 16) How are the “photo" and…arrow_forwardIn anabolism 1) energy is released 2) an energy input is required 3) macromolecules become smaller 4) amino acids are produced from this proteinarrow_forward(biogenesis)- proved that life comes from life because the flies were not in the sealed container Flask sealed Flask covered with gauze Flask unsealed In the 1950s, scientists Miller and Urey conducted a classic experiment in which wa methane, ammonia, and hydrogen were sealed in a flask containing a pair of electr electric spark was fired between the electrodes, and after a week's time, they found acids were present in the flask. Which of the following best explains the significance Corth?arrow_forward
- Bacteria make exoenzymes in order to:(a) Make structures within the bacterium(b) Synthesize large molecules of carbohydrates, proteins,and nucleic acids(c) Hydrolyze large molecules to smaller ones so that theycan be transported into the bacterium(d) Synthesize molecules needed by fastidious organisms(e) None of the above; bacteria do not make exoenzymesarrow_forwardall.arrow_forwardNitrogen-fixing bacteria live throughout the ocean, from its sunlit upper waters to 200 meters (650 Feet) beneath its surface. Recall that nitrogen is a limiting factor in many habitats. What effect would an increase in populations of marine nitrogen-fixers have on carbon uptake and primary productivity in those waters?arrow_forward
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