Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 30.1, Problem 1TYK
Summary Introduction
Introduction:
Animals gets its source of energy from organic compounds that is generated by plants. Plants gets it source of energy from light, water, carbon dioxide and minerals from the soil.
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Chlorophyll a
Chlorophyll b
400 450 500 550 600 650 700
Wavelength (nm)
Plant chlorophyll chemicals will absorb, or take in, light wove energy in order to produce their own
molecules used for cellular energy, Reflected light refers to thase wavelengths of light that will "bou
of the chlorophyll and not be obsorbed.
A scientist runs an experiment in which only light waves measuring between 490 and 600 nm are hitting the
that would explain what would happen based upon the data in the chart.
Chlorophyll a would absorb high amounts of light energy, but chloroplyll b would be absorbing low a
Neither chlorophyl a nor b would be absorbing very much, if any light energy
Chlorophyl b would absorb high amounts of light energy, but chlorophyll a would be absorbing lowa
Both chlorophyl a and b would be absorbing high amounts of light.
Absorption
O 00 O
Absorption
Chlorophyll a
Chlorophyll b
400 450 500 550 600 650 700
Wavelength (nm)
Plant chlorophyll chemicals will absorb, or take in, light wave energy in order to produce their own organic
molecules used for cellular energy. Reflected light refers to those wavelengths of light that will "bounce off"
of the chlorophyll and not be absorbed.
A scientist runs an experiment in which only light waves measuring between 490 and 600 nm are hitting the plant. Select the answer
that would explain what would happen based upon the data in the chart.
Chlorophyll a would absorb high amounts of light energy, but chloroplyll b would be absorbing low amounts of energy.
Neither chlorophyl a nor b would be absorbing very much, if any, light energy.
Chlorophyl b would absorb high amounts of light energy, but chlorophyll a would be absorbing low amounts of energy.
Both chlorophyl a and b would be absorbing high amounts of light.
Absorption
Chlorophyll a
Chlorophyll s
400 450 500 550 600 650 700
Wavelength (nm)
Plant chlorophyll chemicals will absorb, or take in, light wave eniergy in arder to produce ther
molecules used for cellular energy. Reflected light refers to those wovelengths of light thet will
of the chlorophyll and not be absorbed.
Select the conclusion that most accurately summarizes the data in diagram 3.
Red and blue light waves have equal importance during photosynthesis.
The majority of light energy is attained from red light, while the blue light waves provide additiicn
photosynthesis.
The majority of light energy is attained from blue light, while the red light waves provide ado
photosynthesis.
O Medium length light waves are important to photosynthesis
Chapter 30 Solutions
Principles of Biology
Ch. 30.1 - Prob. 1TYKCh. 30.1 - Prob. 2TYKCh. 30.2 - Prob. 1CCCh. 30.2 - Prob. 2CCCh. 30.2 - Prob. 1TYKCh. 30.2 - Prob. 2TYKCh. 30.3 - Prob. 1TYKCh. 30.3 - Prob. 2TYKCh. 30.4 - Prob. 1BCCh. 30.4 - Prob. 1TYK
Ch. 30.4 - Prob. 2TYKCh. 30.5 - Prob. 1CCCh. 30.5 - Prob. 2CCCh. 30.5 - Prob. 1TYKCh. 30.5 - Prob. 2TYKCh. 30.5 - Which scenario is most closely related to sugar...Ch. 30 - Which of the following can limit plant growth in...Ch. 30 - Prob. 2TYCh. 30 - Soil organic matter provides the benefit of...Ch. 30 - Prob. 4TYCh. 30 - Prob. 5TYCh. 30 - Prob. 6TYCh. 30 - Prob. 7TYCh. 30 - Prob. 8TYCh. 30 - Why is it a bad idea to overfertilize your...Ch. 30 - Prob. 2CCQCh. 30 - Prob. 3CCQCh. 30 - Prob. 1CBQCh. 30 - Prob. 2CBQ
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- Figure 8.18 Which of the following statements is true? In photosynthesis, oxygen, carbon dioxide, ATP, and NADPH are reactants. G3P and water are products. In photosynthesis, chlorophyll, water, and carbon dioxide are reactants. G3P and oxygen are products. In photosynthesis, water, carbon dioxide, ATP, and NADPH are reactants. RuBP and oxygen are products. In photosynthesis, water and carbon dioxide are reactants. G3P and oxygen are products.arrow_forwardChlorophyll a Chlorophyll b 400 450 500 550 600 650 700 Wavelength (nm) Plant chlorophyll chemicals will absorb, or take in, light wave energy in order to produce their own arganic molecules used for cellular energy. Reflected light refers to those wavelengths of light that will "bounce off of the chlorophyll and not be absorbed. elect the best light combination to place your plants in for them to be able to maximize chemical energy production. O red and green O green and blue D blue and red O blue and yellow Absorptionarrow_forwardPhotosynthesis directly opposes respiration in determining how plants influence atmospheric CO2 concentrations. When a leaf is in the light, both photosynthesis and respiration are occurring simultaneously. The data in the Table were collected from the leaf of a sagebrush plant that was enclosed in a chamber that measures the rate of CO2 exchange. The same leaf was used to collect the data in Interpret the Data in Chapter 7. Respiration is shown as a negative and photosynthesis as a positive rate of CO2 exchange. The net photosynthesis rate is the amount of CO2 (in micromoles per square meter per second) assimilated by the leaf while respiration is occurring; a positive value indicates more photosynthesis is occurring than respiration. The light exposed to the leaf is quantified as the number of photons in the 400 to 700 nm wavelength, the photosynthetic photon flux density (PPFD); 2,000 mol/m2/s is equivalent to the amount of light occurring at midday in full Sun. Observation Photosynthetic Photon Flux Density (PPFD) (mol/m2/s) Net Photosynthesis (mol/m2/s) 1 2,000 9.1 2 1,500 8.4 3 1,250 8.2 4 1,000 7.4 5 750 6.3 6 500 4.8 7 250 2.2 8 0 -2.0 Why is net photosynthesis negative when PPFD is zero? Looking at the respiration data from Interpret the Data in Chapter 7, at what temperature do you think these data were collected? Source: Data based on unpublished research by Brent Ewers, University of Wyoming.arrow_forward
- Figure 46.10 Pyramids depicting the number of organisms or biomass may be inverted, upright, or even diamond-shaped. Energy pyramids, however, are always upright. Why?arrow_forwardBiofuels A lot of energy is locked up in the chemical bonds of molecules made by plants. That energy can fuel consumers, as when an animal cell powers ATP synthesis by aerobic respiration. It can also fuel our cars, which run on energy released by burning biofuels or fossil fuels. Both processes are fundamentally the same: They release energy by breaking the bonds of organic molecules. Both use oxygen to break those bonds, and both produce carbon dioxide. Unlike fossil fuels, biofuels are a renewable source of energy: We can always make more of them simply by growing more plants. Also unlike fossil fuels, biofuels do not contribute to global climate change, because growing plant matter for fuel recycles carbon that is already in the atmosphere. Corn, soy, sugarcane, and other food crops are rich in oils, starches, and sugars that can be easily converted to biofuels. The starch in corn kernels, for example, can be enzymatically broken down to glucose, which is fermented to ethanol by bacteria or yeast. However, growing food crops for biofuel production typically requires a lot of energy (in the form of fossil fuels) and it damages the environment. Making biofuels from other plant matter such as weeds or agricultural waste requires additional steps, because these materials contain a higher proportion of cellulose. Breaking down this tough carbohydrate to its glucose monomers adds cost to the biofuel product. In 2006, David Tilman and his colleagues published the results of a 10-year study comparing the net energy output of various biofuels. The researchers made biofuel from a mixture of native perennial grasses grown without irrigation, fertilizer, pesticides, or herbicides, in sandy soil that was so depleted by intensive agriculture that it had been abandoned. The energy content of this biofuel and the energy it took to produce it were measured and compared with that of biofuels made from food crops (Figure 5.16). Which of the three crops required the least amount of land to produce a given amount of biofuel energy?arrow_forwardBiofuels A lot of energy is locked up in the chemical bonds of molecules made by plants. That energy can fuel consumers, as when an animal cell powers ATP synthesis by aerobic respiration. It can also fuel our cars, which run on energy released by burning biofuels or fossil fuels. Both processes are fundamentally the same: They release energy by breaking the bonds of organic molecules. Both use oxygen to break those bonds, and both produce carbon dioxide. Unlike fossil fuels, biofuels are a renewable source of energy: We can always make more of them simply by growing more plants. Also unlike fossil fuels, biofuels do not contribute to global climate change, because growing plant matter for fuel recycles carbon that is already in the atmosphere. Corn, soy, sugarcane, and other food crops are rich in oils, starches, and sugars that can be easily converted to biofuels. The starch in corn kernels, for example, can be enzymatically broken down to glucose, which is fermented to ethanol by bacteria or yeast. However, growing food crops for biofuel production typically requires a lot of energy (in the form of fossil fuels) and it damages the environment. Making biofuels from other plant matter such as weeds or agricultural waste requires additional steps, because these materials contain a higher proportion of cellulose. Breaking down this tough carbohydrate to its glucose monomers adds cost to the biofuel product. In 2006, David Tilman and his colleagues published the results of a 10-year study comparing the net energy output of various biofuels. The researchers made biofuel from a mixture of native perennial grasses grown without irrigation, fertilizer, pesticides, or herbicides, in sandy soil that was so depleted by intensive agriculture that it had been abandoned. The energy content of this biofuel and the energy it took to produce it were measured and compared with that of biofuels made from food crops (Figure 5.16). The production of which biofuel was most efficient (which had the highest ratio of energy output to energy input)?arrow_forward
- Biofuels A lot of energy is locked up in the chemical bonds of molecules made by plants. That energy can fuel consumers, as when an animal cell powers ATP synthesis by aerobic respiration. It can also fuel our cars, which run on energy released by burning biofuels or fossil fuels. Both processes are fundamentally the same: They release energy by breaking the bonds of organic molecules. Both use oxygen to break those bonds, and both produce carbon dioxide. Unlike fossil fuels, biofuels are a renewable source of energy: We can always make more of them simply by growing more plants. Also unlike fossil fuels, biofuels do not contribute to global climate change, because growing plant matter for fuel recycles carbon that is already in the atmosphere. Corn, soy, sugarcane, and other food crops are rich in oils, starches, and sugars that can be easily converted to biofuels. The starch in corn kernels, for example, can be enzymatically broken down to glucose, which is fermented to ethanol by bacteria or yeast. However, growing food crops for biofuel production typically requires a lot of energy (in the form of fossil fuels) and it damages the environment. Making biofuels from other plant matter such as weeds or agricultural waste requires additional steps, because these materials contain a higher proportion of cellulose. Breaking down this tough carbohydrate to its glucose monomers adds cost to the biofuel product. In 2006, David Tilman and his colleagues published the results of a 10-year study comparing the net energy output of various biofuels. The researchers made biofuel from a mixture of native perennial grasses grown without irrigation, fertilizer, pesticides, or herbicides, in sandy soil that was so depleted by intensive agriculture that it had been abandoned. The energy content of this biofuel and the energy it took to produce it were measured and compared with that of biofuels made from food crops (Figure 5.16). About how much energy did ethanol produced from one hectare of corn yield? How much energy did it take to grow and produce that ethanol?arrow_forwardPlants are. O autotrophs O chemotrophs O heterotrophs O None of the abovearrow_forwardCarbon fixation during the light-independent reaction of photosynthesis obtains its carbon atoms: from water molecules only from carbon monoxide molecules only from H2O molecules only from carbon dioxide molecules only from CO molecules onlyarrow_forward
- Which of the following statements about the challenges of C3 photosynthesis under hot conditions is TRUE? O When they close stomatal cells, they save water but lose too much O2. O Rubisco has a higher affinity for CO2, making the rate of photosynthesis too rapid. When stomatal cells close, photorespiration increases and CO2 is lost. C3 plants have to spend energy to store carbon in a separate specialized cell.arrow_forwardLight Dependent Reactions Water is split in to Light energy is converted into energy. NADPH Oxygen is a waste product. thylakoid. ATParrow_forwardThree plants grow side by side in a pond. Glucose and starch are measured for each and shown in relative units below, along with the pH of the vacuole at dawn and at noon. Plant Glucose Starch Vacuolar pH, dawn Vacuolar pH, noon A 100 50 1 4 B 100 10 4 4 C 1,000 2 4 4 Part A:Explain what kind of photosynthesis is being done by each plant with some details about how each works. Justify your answer. Part B:Decipher which plant is biochemically defective after the light-independent reactions and explain how you deciphered this.arrow_forward
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