3 2. What is the original source of almost all the energy in most ecosystems? CarbohydratesSunlightWatercarbon
4 3. An organism that uses energy to produce its own food supply from organic compounds is called a(an)HeterotrophConsumerDetritivoreAutotroph
5 4. Corn planted in a field that has been previously planted with legumes and then plowed under is likely to beLess productive because legumes remove phosphorus from the soil.More productive because bacteria living on the roots of legumes fix nitrogen in the soil.More productive because nitrogen fixing bacteria help to keep away pests.Less productive because the legumes have already taken all the nitrogen, carbon and phosphorus from the soil.
6 5. The repeated movement of water between the Earth’s surface and the atmosphere is called The water cycleThe condensation cyclePrecipitationevaporation
7 6. Which of the following is not recycled in the biosphere. WaterNitrogenCarbonEnergy
8 7. What is the process by which bacteria convert nitrogen gas in the air to ammonia? Nitrogen fixationExcretionDecompositionDenitrification
9 8. Carbon cycles through the biosphere in all of the following processes except PhotosynthesisTranspirationBurning fossil fuelsDecomposition of plants and animals
10 9. Which of the following has a direct role in the nitrogen cycle? BacteriaLegumesDecomposersAll of the above
11 10. Energy is released from ATP when A phosphate group is addedAdenine bonds to riboseATP is exposed to sunlightA phosphate group is removed
12 11. A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27⁰C. The gas being collected is probablyOxygenCarbon dioxideATPVaporized water
13 12. Photosynthesis uses sunlight to convert water and carbon dioxide into OxygenHigh energy sugars and starchesATP and oxygenOxygen and high energy sugars and starches
14 13. Plants gather the sun’s energy with light-absorbing molecules called PigmentsThylakoidsChloroplastsGlucose
15 14. Most plants appear green because chlorophyll Does not absorb green lightReflects violet lightAbsorbs green lightNone of the above
16 15. A granum is aStack of chloroplastsStack of thylakoidsMembrane enclosing a thylakoidPhotosynthetic pigments molecule
17 16. The stroma is the region outside the ThylakoidsChloroplastsPlant cellsAll of the above
18 17. Where in the chloroplast is chlorophyll found? In the stromaIn the thylakoidIn the ATPIn the glucose
19 18. Where do the light-dependent reactions take place? In the stromaIn the mitochondriaWithin the thylakoid membranesOnly in the chlorophyll molecules
20 19. What are the produces of the light-dependent reactions? Oxygen gasATPNADPHAll of the above
21 20. Which of the following is not a step in the light-dependent reactions? High energy electrons move through the electron transport chain.Pigments in the thylakoid absorb light.AT synthase allows H+ ions to pass through the thylakoid membrane.ATP and NADPH are used to produce high energy sugars.
22 21. Why does the inside of the thylakoid membrane become positively charged during the light-dependent reactions?H+ ions are released as water splits.ATP synthase allows H+ ions to pass through the membraneATP synthase produces ATP from ADP.Carbon dioxide builds up in the stroma.
23 22. The Calvin Cycle is another name for light-independent reactionsLight-dependent reactions.PhotosynthesisAll of the above
24 23. What is a product of the Calvin cycle? Oxygen gasATPHigh-energy sugarsCarbon dioxide gas
25 24. How does the Calvin cycle differ from the light-dependent reactions? It takes place in the stromaIt takes place in chloroplastsIt requires lightIt takes place in the thylakoid
26 25. If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars?More sugars will be producedNo sugars will be producedThe same number of sugars will be produced by without carbon dioxideCarbon dioxide does not affect the production of high-energy sugars in plants.
27 26. Which of the following affects the rate of photosynthesis? WaterTemperatureLight intensityAll of the above
28 27. Which of the following is not a characteristic of all plants? All are eukaryoticAll have cell wallsAll produce seedsAll are multicellular
29 28. Without plants,Animals could not live on land.There would be no green algae in the oceans.Animals could not undergo cellular respiration.There would be not carbon dioxide in the atmosphere.
30 29. Of all the following locations, you would be most likely to find mosses growing in Hot, dry mineral-poor soilSandy soil near a beach.Low, shaded ground near a small pond.High, exposed ground with direct sun.
31 30. Xylem tissue is important to ferns because it Can conduct water over long distancesAllow water to diffuse into the rootsCarries carbohydrates to all parts of the plantAllows ferns to reproduce in dry environments.
32 31. Which of the following includes a plant embryo, a food supply and a protective covering? Pollen grainSporeSeedgametophyte
33 32. The responses of plants to external stimuli are called TropismsAuxinsGibberillinsCytokinins
34 33. The growth patterns of ivy tendrils that wrap around objects is an example of GravitropismPhototropismThigmotropismPhotoperiodism
35 34.The brilliant colors of leaves in the fall are a result of New synthesis of orange and yellow pigments in the leaves.The movement of chlorophyll from the stems to the leaves.The stopping of chlorophyll synthesis, making the carotenes (orange) and the xanthophyll (yellow) pigments visible.The decrease of auxins in the meristems and the increase of phytochrome in the leaves.
36 35. Plants are classified based on which of the following characteristics? Color and shapeType of pigments and photosynthesis stages it goes throughType and time of growthVascular tissue and type of seed production
37 36. Which of the following is a way that humans are disrupting the important nutrient cycles? PollutionCombustion of fossil fuelsOverpopulationAll of the above
38 37. Which of the following is a correct match up to the element and its function in the plant? Potassium – cell wallsPhosphorus – ATPSulfur – cell membranesNitrogen – stoma opening