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The animation for multiple choice questions may not work on some computers.
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Transcript of The animation for multiple choice questions may not work on some computers.
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The animation for multiple choice questions may not work on some computers.
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During photosynthesis, plants convert atmospheric carbon into proteins.
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Ecosystem pollution can result from both natural events and human actions.
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Which of the follow are reactants in a photosynthesis reaction?
None of the above
Oxygen and water
Carbon dioxide and water
Oxygen and glucose
Carbon dioxide and glucose
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Which of the following types of biological molecules include the “blueprint” for life?
Phospholipids
Lipids
Carbohydrates
Amino acids
Nucleic acids
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What process directly converts atmospheric nitrogen, N2, into a form plants can use?
Sedimentation
Eutrophication
Nitrification
Denitrification
Nitrogen fixation
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A pollutant with which of the following characteristics would most likely bioaccumulate in a primary consumer?
None of the above
fatal in very low concentrations
easily broken down in the body
not taken up by plants
degrades slowly in the environment
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What is one way that human agriculture affects ecosystems?
None of the above
enhancement of natural stream flow patterns
increased growth of trees
decreased production of pollutants
depletion of soil nutrients
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Organisms that are low in marine food chains, such as plankton and shrimp, generally contain very low levels of mercury. Organisms that are higher in the food chains, such as tuna fish and sharks, generally have much higher levels of mercury in their bodies. Which of the following processes best explains this observation?
succession
pollutant cycling
biodegradation
natural selection
biomagnification
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Which of the following processes reduces the availability of phosphorus for living things?
decomposition of dead organisms
agricultural runoff
weathering of rock
production of fertilizer
burial of marine skeletons
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Which of the following processes removes carbon from the atmosphere?
Cellular respiration in muscle cells
Decomposition of dead organisms
Burning fossil fuels
Cutting down trees
Photosynthesis in ocean plankton
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Which of the following elements is required for the formation of nucleic acids and proteins, but not sugars?
None of the above
Hydrogen
Oxygen
Carbon
Nitrogen
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Which of the following is an inorganic compound that is part of the nitrogen cycle?
None of the above
methane
glucose
water
ammonia
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How do consumers get the nitrogen their bodies need?
consumers do not nitrogen
through the uptake of nitrogen-containing fertilizers
through symbiosis with nitrogen-fixing bacteria
by breathing the nitrogen in the air
by eating other organisms
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Living organisms need ____________ because it makes up part of the backbone of DNA molecules and is an important part of cell membranes.
molybdenum
sulfur
oxygen
nitrogen
phosphorus
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Which of the following elements is found in all biological molecules?
plutonium
sulfur
nitrogen
phosphorus
carbon
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Which of the following processes best explains why an adult fish has a DDT concentration of 2.07 ppm while an osprey has a DDT concentration of 13.80 ppm?
None of the above
bioaccumulation
biodegradation
bioremediation
biomagnification
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How is the phosphate made available to plants and animals on Earth?
None of the above
Lightning converts phosphorus into phosphate.
Bacteria convert phosphorus into phosphate.
Plants release phosphorus during photosynthesis.
Weathering releases phosphate into the soil.
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A farmer decides to grow peas and soybeans. He plants these two crops in all of his fields. What impact would this have on the nutrients in the soil?
None of the above
There would be a decrease in the amount of nitrate (NO3−).
There would be an increase in the amount of phosphate (PO43−).
There would be an increase in the amount of carbon dioxide (CO2)
There would be an increase in the amount of ammonium (NH4+).
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Which organism in the picture on the left would have the highest concentration of PCBs?
The Killer Whale
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What do the following processes have in common?- Volcanic Activity- Decomposition- Cellular Respiration
None of the above
They are all part of the nitrogen cycle.
They increase the PO4 in the soil.
They help reduce greenhouse gases.
They all release CO2 into the atmosphere.
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Your classmate tells you that all forest fires are bad. Which of the following observations could you use to challenge your classmate’s assumption?
None of the above.
Forest fires threaten human settlements.
Forest fires release carbon dioxide into the environment.
Forest fires destroy bird nests and animal habitats.
Forest fires recycle nutrients and create more diversity in the forest.