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Which is an interconnection of food chains in an ecosystem?



Energy flows from the producer level to the  level.



Which process do plants use to turn sunlight into food energy?



A diagram illustrates that grass is eaten by insects, birds, and mice. The insects are eaten by hawks, snakes, and toads. The birds and mice are eaten by foxes, hawks, and snakes. The toad is also eaten by the snake. Which best describes the diagram? 



Which kind of organism is an autotroph?



Which kind of organism is a heterotroph?



Food chains show energy transfer between organisms. The size of a food chain can vary, yet there is a limit to the number of levels that a food chain can reach. Why is there a limit to the number of levels that a food chain can reach?



If the data below were put into a bar graph, which animal would have the lowest bar on the bar graph?

Number of Individuals in a Rocky Mountain Forest 

Organism

Population

Mountain lions

150

Bobcats

300

Coyotes

10,000

Deer

25,000



Yellowfin tuna, or Thunnus albacores, are large sport fish that are found in tropical and subtropical waters around the world. They typically school under objects such as boats or patches of driftwood for protection from predators. Schooling under these structures also provides yellowfin tuna with easy access to a food source such as smaller herbivorous fish that may be foraging for food around the structures. Which trophic level does yellowfin tuna fill in a food chain?


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