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In a food web, the numbers of each organism typically exist in a relatively stable proportion. If an oil
spill killed a large amount of zooplankton, what would be the next thing that would happen?
A The number of tiger sharks would decrease.
B The number of phytoplankton would increase.
C The number of clams, mackerels, and jellyfish would decrease.
D The number of herring, whelk, squids, and loggerhead turtles would increase.
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- In a simple food chain, a frog eats insects, and a snake eats the frog. The primary role of the frog in the food chain is _____________________. a) to be a source of energy b) to find a space to live c) to start a new species d) to make an ecosystemWhich factor most directly limits the variety of herbivores living in an area? a) amount of nitrogen in the atmosphere b) number of decomposers present c) types of plants present d) kinds of minerals in the waterA food web: A. Is made by a food spider B. Shows how feeding relationships are interlinked C. Shows the number of organisms in a habitat D. Only shows important animals
- A food chain would be a better resource than a food web to answer which question? a. How does energy move from an organism in one trophic level to an organism on the next trophic level? b. How does energy move within a trophic level? c. What preys on grasses? d. How is organic matter recycled in a forest?Based on the food chain shown below, how can unregulated collection of shark fins used in shark fin soup cause the collapse of a coral reef ecosystem? explain your predicted trends.a) how would an increase in the number of producers affect the number and size of trophic levels in an ecosystem? b) how would an increase in the availability of a resource that was limiting the herbivore population size affect the number and size of trophic levels in an ecosystem?
- a This food web shows the flow of energy through a desert ecosystem Which correctly describes a relationship shown on this food web ? A. The coyote and the mountain lion have a predator /prey relationship B. The coyote and the mountain lion have a producer /consumer relationship C. The golden - mantled squirrel and the big sagebrush have a predator /prey relationship . D. The golden -mantled squirrel and the big sagebrush have a producer /consumer relationshipBiomagnification is the process by which the level of contaminants increase as they move upwards in a food chain. If bivalves in the Chesapeake Bay become contaminated from run-off, which organism will experience the highest level of contamination? a) Bivalves b) Sea duck c) Tundra swan d) Bald eagleConsider a trophiccascade with 4 levels: 1) predatory fish that consume planktivorous fish, 2) planktivorous fish that consume zooplankton,3) herbivorous zoplankton that consume phytoplankton, and 4) phytoplankton. True or False: A reduction in predatory fish will increase the level of phytoplankton. True False
- A salmon feeds on crabs and small fishes, which in turn feed on zooplankton that feed on phytoplankton which in turn uses up nitrates in the water. If there are overfishing of salmons, which things should decrease? a. zooplanktonb. small fishc. phytoplanktond. a and de. b and cStudy the food web above. How does the food web illustrate the importance of biodiversity for human needs. Choose the best answer. A. The hawk is a top consumer so it is needed for human sightseeing B. All the organisms in the food web could be replaced with a man made organism C. Humans Consume Corn and all the organisms keep a delicate balance to maintain proper corn production D. Grasshoppers and mice need to be eliminated from the food web to increase food production for humansWhich of the following best describes bycatch? a. dividing catch of marine life among fishing boats b. bonus catch of marine life, such as increased numbers of intended catch c. unintentional catch of nontarget marine life in fishing gear d. catching too much of a target species of fish
