Biology (MindTap Course List)
10th Edition
ISBN: 9781285423586
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 9, Problem 8TYU
An organism characterized as a photoautotroph obtains energy from _____ and carbon from _______. (a) light; organic molecules (b) light; CO2 (c) organic molecules; organic molecules (d) organic molecules; CO2 (e) O2; CO2
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Which of the following is not true about photoautotrophs?(a) They require CO2 and light.(b) They synthesize organic molecules from inorganicmolecules.(c) They are a subdivision of heterotrophs.(d) They are a subdivision of autotrophs.(e) All the above are true.
you have embarked on an ambitious research project: to create life in a test tube. you boil up a rich mixture of yeast extract and amino acids in a flask along with a sprinkling of the inorganic salts known to be essential for life. you seal the flask and allow it to cool. after several months, the liquid is as clear as ever, and there are no signs of life. a friend suggests that excluding the air was a mistake, since most life as we know it requires oxygen. you repeat the experiment, but this time you leave the flask open to the atmosphere. to your great delight, the liquid becomes cloudy after a few days and under the microscope you see beautiful small cells that are clearly growing and dividing. does this experiment prove that you managed to generate a novel life-form? how might you redesign your experiment to allow air into the flask, yet eliminate the possibility that contamination is the explanation for the results? (for a ready-made answer, look up the classic experiments of…
(a) Define heterotrophs.
(b) Which pigment is responsible for making plants green in color?
Chapter 9 Solutions
Biology (MindTap Course List)
Ch. 9.1 - Describe the physical properties of light and...Ch. 9.1 - Prob. 1CCh. 9.1 - Prob. 2CCh. 9.2 - Diagram the internal structure of a chloroplast...Ch. 9.2 - Prob. 3LOCh. 9.2 - Prob. 1CCh. 9.2 - What is the significance that the combined...Ch. 9.2 - Prob. 3CCh. 9.3 - Describe photosynthesis as a redox process.Ch. 9.3 - Distinguish between the light-dependent reactions...
Ch. 9.3 - Prob. 1CCh. 9.3 - In what ways do the carbon fixation reactions...Ch. 9.4 - Describe the flow of electrons through...Ch. 9.4 - Explain how a proton (H+) gradient is established...Ch. 9.4 - Prob. 1CCh. 9.4 - Prob. 2CCh. 9.4 - PREDICT Can cyclic electron transport alone...Ch. 9.5 - Summarize the three phases of the Calvin cycle and...Ch. 9.5 - Prob. 9LOCh. 9.5 - Prob. 10LOCh. 9.5 - Describe what happens in each of the three phases...Ch. 9.5 - A decrease in entropy occurs during the CO2 uptake...Ch. 9.5 - In what ways does photorespiration differ from...Ch. 9.5 - Prob. 4CCh. 9.6 - Prob. 11LOCh. 9.6 - Prob. 1CCh. 9.7 - State the importance of photosynthesis both in a...Ch. 9.7 - Prob. 1CCh. 9.7 - Prob. 2CCh. 9 - Where is chlorophyll located in the chloroplast?...Ch. 9 - In photolysis some of the energy captured by...Ch. 9 - Prob. 3TYUCh. 9 - In ________, electrons that have been energized by...Ch. 9 - The Calvin cycle begins when CO2 reacts with (a)...Ch. 9 - The enzyme directly responsible for almost all...Ch. 9 - Prob. 7TYUCh. 9 - An organism characterized as a photoautotroph...Ch. 9 - VISUALIZE Draw a simple sketch illustrating a...Ch. 9 - Prob. 10TYUCh. 9 - Prob. 11TYUCh. 9 - Prob. 12TYUCh. 9 - CONNECT High-energy electrons from glucose are...Ch. 9 - PREDICT What would life be like for...Ch. 9 - EVOLUTION LINK Propose an explanation for...Ch. 9 - INTERPRET DATA The figure depicts the absorption...Ch. 9 - SCIENCE, TECHNOLOGY, AND SOAETY What strategies...
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- Photoautotrophs use(A) light as an energy source and CO2 as a carbon source.(B) light as an energy source and methane as a carbon source.(C) N2 as an energy source and CO2 as a carbon source.(D) CO2 as both an energy source and a carbon source.arrow_forwardWhich of the following is a living organism? (Select all that apply.) If it is not living, which criterion, or criteria, does it not meet? (a) an oak tree (b) an influenza virus (c) the fungus that causes white-nose syndrome in bats (d) a diamond (e) your teacherarrow_forwardWhich 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_forward
- State whether the following statements are true or false. If false, write the correct statement by changing the incorrect word / words only. (i) Mortality is the number of deaths per thousand of the population per decade. (ii) The symbiotic bacteria that helps in Nitrogen fixation is Rhizobium radicicola. (iii) Rods are responsible for vision in the dark. (iv) The dark reaction of photosynthesis is light independent. (v) Process of fusion of the sperm nucleus and the egg nucleus is termed implantation.arrow_forwardPhotosystem II uses sunlight to strip electrons (and protons) away from which of the following substrate molecules (in the chloroplasts of green plants and green algae)? C6H12O6 only C6H12O6, H2O, and CO2 only CO2 only H2O and C6H12O6 only H2O onlyarrow_forwardWhich of the following is correct:(a) Cells of all living organisms have a nucleus.(b) Both animal and plant cells have a well defined cell wall.(c) In prokaryotes, there are no membrane bound organelles.(d) Cells are formed de novo from abiotic materials.arrow_forward
- How would your understanding be different if the experiment had only looked at the overall results on the light reactions, instead of looking at how salinity affected each photosystem?arrow_forwardWhich of the following statements is not true?(A) Archaea and bacteria have different membrane lipids.(B) The cell walls of archaea lack peptidoglycan.(C) Only bacteria have histones associated with DNA.(D) Only some archaea use CO2 to oxidize H2, releasing methanearrow_forwardPhotosystems are essential for the photosynthetic reaction to be carried out. While in a group discussion, one of your friend told you that "Coordination between two photosystems are required for the completion of a successful photosynthetic event". Do you agree or disagree with this statement? Please provide valid scientific reasonings for your statement.arrow_forward
- Chlorophyll is the green pigment found in plants. Which of the following statements can be implied regarding chlorophyll? O Chlorophyll does not absorb in the UV region. O Chlorophyll is made up of only C- H, C- C, C- N and C-O single bonds. O Chlorophyll uses the blue and red colors for photosynthesis. O Chlorophyll uses the green color for photosynthesis.arrow_forwardSince carotenoids are part of the _________, their electrons are not passed on when they get excited. A) electron carriers of the photosystem B) electron transport chain C) antenna complex of the photosystem D) reaction center of the photosystemarrow_forwardCellular respiration (a) is a process whereby sunlight is used to synthesize cell components with the release of energy (b) occurs in heterotrophs only (c) is carried on by both autotrophs and heterotrophs (d) causes chemical changesin DNA (e) occurs in response to environmental changesarrow_forward
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