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e Insert Design Layout References Mailings Review View Help Tell me what yo During which stage of photosynthesis does Carbon fixation ocour? Light Reactions or Calvin Cyde (191) What travels "down" this route? Water ORDER FOR EXAM) -> chlorophyl >NADPH carbon dioxide(191) (KNOw 10.2 The light reactions convert solar energy to the dhemical energy of ATP and NADPH Light driven electron flow pushes electronsfrom to (201) Where is the chemical energy at the end of the lightreactions? (two chemicals) (201) 10.3 The Calvin Cydeuses the chemical energy of ATP and NADPH to reduce CO, to sugr The Calvin Cyde is anabolic because it builds Which two molecules store the energy to make sugar during the Calvin Cyde? (201) Which molecule from air is the first to be incorporated during the Calvin Cyde? (201) (201) 10.5 Life depends on photosynthesis Which two products of photosynthesis are needed by mostorganisms on this planet? (206) Chapter 55 Ecosystems 55.1 Physcal laws govern energy flow Which trophiclevel supports all the others by making food? (1238) Identfy the level of consumer for herbivores and then carnivores. (128) Which trophiclevel depends on the breakdown products of detritvores? (1238) 55.2 Energy controls primary production ecosystems What do scientists call the amount of light energy converted to chemical energy in an ecosystenm (1239) Which twofactors limitprimary producton the mostin AQUATIC ecosystems? (1240) Which two factors limitprimary producton the mostin TERRESTRIAL ecosystems? (1241) 553 Energy transfer between trophic levels is typical y only 10% efident What percent of energy usually is transferred to the next trophiclevel? (1244 Whatlimits the number/abundance of top-level carnivores in a food chain? (1244) 55.4 Bologcal and geochemical processes cyde nutrients and water in ecosystems Which process takes carbon dioxide out of the air? Photosynthesis or cellular respiraton (1248) In addition to celludar respiration, what man-made processes can release carbon dloxide into the atmosphere? (1248) Page 5 of 6 pe here to searchExplanation / Answer
1. During which stage of photosynthesis does CO2 fixation occur?
Answer: Calvin Cycle (Dark Reaction)
2. What travels down this route? water- chlrophyll-NADPH-CO2
Answer: Electrons (e-) released by splitting of water molecule travels through the electron transport chain of photosynthesis for making energy.
3. Light driven electron flow pushes electrons from Photosystem II to Photosystem I.
4. Where is the chemical energy at the end of the light reaction?
Answer: Chemical energy stored in the form of ATP and NADPH form.
5.The Calcin cycle is anabolic process because it builds formation of organelles by using other form of chemical energy that is ATP and NADPH
6. Which two molecules store the energy to make sugar during the Calvin cycle
Answer: ATP and NADPH molecules
7. Which molecule from air is the first to be incorporated during Calvin cycle
Answer: Calvin cycle is also called CO2 fixation. the molecule fixed or incorporated is the Carbon Dioxide ( CO2) molecule with the help of RuBisCO
8. Which two products of photosynthesis are needed by most organisms on this planet?
Answer: The two main products of photosynthesis are oxygen and sugar.
9. Which trophic level supports all the others by making food
Answer: Primary level
10. Identify the level of consumer for herbivores and then carnivores
Answer: Secondary consumer level
11. Which trophic level depends on the breakdown products of detritivores
Answer: Producer
12. What do scientists call the amount of light energy converted into chemical energy in an ecosystem?
Answer: The rate at which organisms convert light energy (or inorganic chemical energy) to the chemical energy of organic compounds is called primary productivity.
13. Which two factors limit primary production the most in aquatic ecosystem?
Answer: Light and Nutrients
14. Which two factors limit primary production the most in terrestrial ecosystem?
Answer: In terrestrial ecosystems, temperature and moisture are the key factors limiting primary production.
15. What percent of energy is usually transferred to the next trophic level?
Answer: 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat.
16. What limits the number of top level carnivores in food chain?
Answer: Only a fraction of the energy available at one trophic level is transferred to the next trophic level. The rule of thumb is 10%, but this is very approximate. Typically the numbers and biomass of organisms decrease as one ascends the food chain.
17. What process takes CO2 out of the Air?
Answer: Cellular Respiration by Calvin cycle
18. In addition to cellular respiration, what man made processes can release CO2 in the atmosphere?
Answer: Burning of Fossil fuels in vehicles, industrial processes release CO2
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