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Plant Review
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Plants are Producers Consumers Herbivores Omnivores
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2. What is the original source of almost all the energy in most ecosystems?
Carbohydrates Sunlight Water carbon
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3. An organism that uses energy to produce its own food supply from organic compounds is called a(an) Heterotroph Consumer Detritivore Autotroph
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4. Corn planted in a field that has been previously planted with legumes and then plowed under is likely to be Less 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.
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5. The repeated movement of water between the Earth’s surface and the atmosphere is called
The water cycle The condensation cycle Precipitation evaporation
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6. Which of the following is not recycled in the biosphere.
Water Nitrogen Carbon Energy
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7. What is the process by which bacteria convert nitrogen gas in the air to ammonia?
Nitrogen fixation Excretion Decomposition Denitrification
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8. Carbon cycles through the biosphere in all of the following processes except
Photosynthesis Transpiration Burning fossil fuels Decomposition of plants and animals
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9. Which of the following has a direct role in the nitrogen cycle?
Bacteria Legumes Decomposers All of the above
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10. Energy is released from ATP when
A phosphate group is added Adenine bonds to ribose ATP is exposed to sunlight A phosphate group is removed
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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 probably Oxygen Carbon dioxide ATP Vaporized water
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12. Photosynthesis uses sunlight to convert water and carbon dioxide into
Oxygen High energy sugars and starches ATP and oxygen Oxygen and high energy sugars and starches
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13. Plants gather the sun’s energy with light-absorbing molecules called
Pigments Thylakoids Chloroplasts Glucose
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14. Most plants appear green because chlorophyll
Does not absorb green light Reflects violet light Absorbs green light None of the above
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15. A granum is a Stack of chloroplasts Stack of thylakoids Membrane enclosing a thylakoid Photosynthetic pigments molecule
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16. The stroma is the region outside the
Thylakoids Chloroplasts Plant cells All of the above
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17. Where in the chloroplast is chlorophyll found?
In the stroma In the thylakoid In the ATP In the glucose
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18. Where do the light-dependent reactions take place?
In the stroma In the mitochondria Within the thylakoid membranes Only in the chlorophyll molecules
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19. What are the produces of the light-dependent reactions?
Oxygen gas ATP NADPH All of the above
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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.
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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 membrane ATP synthase produces ATP from ADP. Carbon dioxide builds up in the stroma.
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22. The Calvin Cycle is another name for
light-independent reactions Light-dependent reactions. Photosynthesis All of the above
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23. What is a product of the Calvin cycle?
Oxygen gas ATP High-energy sugars Carbon dioxide gas
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24. How does the Calvin cycle differ from the light-dependent reactions?
It takes place in the stroma It takes place in chloroplasts It requires light It takes place in the thylakoid
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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 produced No sugars will be produced The same number of sugars will be produced by without carbon dioxide Carbon dioxide does not affect the production of high-energy sugars in plants.
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26. Which of the following affects the rate of photosynthesis?
Water Temperature Light intensity All of the above
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27. Which of the following is not a characteristic of all plants?
All are eukaryotic All have cell walls All produce seeds All are multicellular
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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.
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29. Of all the following locations, you would be most likely to find mosses growing in
Hot, dry mineral-poor soil Sandy soil near a beach. Low, shaded ground near a small pond. High, exposed ground with direct sun.
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30. Xylem tissue is important to ferns because it
Can conduct water over long distances Allow water to diffuse into the roots Carries carbohydrates to all parts of the plant Allows ferns to reproduce in dry environments.
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31. Which of the following includes a plant embryo, a food supply and a protective covering?
Pollen grain Spore Seed gametophyte
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32. The responses of plants to external stimuli are called
Tropisms Auxins Gibberillins Cytokinins
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33. The growth patterns of ivy tendrils that wrap around objects is an example of
Gravitropism Phototropism Thigmotropism Photoperiodism
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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.
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35. Plants are classified based on which of the following characteristics?
Color and shape Type of pigments and photosynthesis stages it goes through Type and time of growth Vascular tissue and type of seed production
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36. Which of the following is a way that humans are disrupting the important nutrient cycles?
Pollution Combustion of fossil fuels Overpopulation All of the above
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37. Which of the following is a correct match up to the element and its function in the plant?
Potassium – cell walls Phosphorus – ATP Sulfur – cell membranes Nitrogen – stoma opening
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