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A: Fossil fuels are limited resources hence alternative resources will be needed to meet the future…
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A: Option 1 is the answer. Photosynthesis removes carbon from atmosphere in the form of carbondioxide.
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A: Carbon cycle is a biogeochemical cycle where carbon is exchanged within the biosphere.
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A: Decomposer: These are those organisms that decompose dead organisms. Organisms like fungi,…
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Q: Part 1: Data on carbon storage As you move around the carbon cycle, visit each of the "Carbon…
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- 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). The production of which biofuel was most efficient (which had the highest ratio of energy output to energy input)?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?Efficiency of energy transfers in aquatic ecosystem is typically higher than in land ecosystems because ______. a. aquatic food webs include more endotherms b. algae do not make lignin c. primary production cannot occur in water d. all of the above
- All the following are renewable energy sources except ______. a. hydropower b. wind c. natural gas d. solar energyFigure 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?Which of the following is not an example of an energy transformation? turning on a light switch solar panels at work formation of static electricity none of the above
- Select the ultimate source of energy for nearly every organism on this planet. Select one: A. Plants B. Primary producers C. Heat D. Sugars E. The sunIn a pond ecosystem, mosquito larvae feed on photosynthetic algae. Other larvae, such as dragonfly larvae, feed on the mosquito larvae. The dragonfly larvae are, in turn, consumed by fish, whichcan be preyed upon by raccoons.How many different organisms in this ecosystem get their energy from the food they consume?1. One2.TWO3.Three4.FourAncient Greece and ancient Rome tried to conserve energy in all of the following ways except: A. passing laws against construction of new buildings that would block sunlight to other homes B. building their bath-houses to maximize solar heating of pools C. manufacturing small cars with good gas mileage D. passing laws against the burning of wood from olive treesE. building their homes with south-facing windows and doors, to allow solar heating in winter
- Why do we needthese different from of energy?The connection between producers and consumers is that only: A) heterotrophs can perform photosynthesis to produce energy for all life B) autotrophs can use sun energy to u to produce energy for all organisms C) producers use cellular respiration to produce energy for all life D) heterotrophs can perform cellular respiration producing oxygen for all organismsIs nuclear power environmentally friendly and does it contribute to greenhouse gases. What are some other alternate energy sources?