You go on a canoe trip to the Boundary Waters Canoe Area (BWCA) in Northern Minnesota. This ecosystem is cold most of the year and receives plenty of rainfall. It has many lakes that are full of walleye fish. You know that walleye like to eat minnows. In turn, the minnows feed on scuds (zooplankton) which eat algae (phytoplankton).In this system, mercury released from coal-burning power plants would be at the highest concentration inMultiple Choicethe phytoplankton.the zooplankton.the minnows.the walleyes.The amount of mercury would be the same in all organisms.

You go on a canoe trip to the Boundary Waters Canoe Area (BWCA) in Northern Minnesota. This ecosystem is cold most of the year and receives plenty of rainfall. It has many lakes that are full of walleye fish. You know that walleye like to eat minnows. In turn, the minnows feed on scuds (zooplankton) which eat algae (phytoplankton).In this system, the zooplankton are theMultiple Choicetertiary consumers.secondary consumers.producers.decomposers.primary consumers.

Asian carp are impacting the native food web through their consumption of what food source?zebra musselsplants and planktoncatfishbass

Which of the following is a middle zone feeder?CatlaRohuMrigalCommon carps

During gold mining activities along the Amazon River, mercury (which is used to separate gold from other minerals) is released and dissolves in the water. Which organism would have the highest concentration of mercury in its tissues? A.A bird that feeds on large fish that swim in the riverB.A large fish that feeds on smaller fish in the riverC.A small fish that feeds mostly on algae growing in the riverD.Soybeans watered with water from the river

Select all the correct answers.In an aquatic ecosystem, the fishing of a particular fish species increased. This fish species is a secondary consumer in an energy pyramid. The fishing of the species led to a decrease in its population. In which two ways will this affect the food web? The higher levels in the pyramid will receive more energy. The higher levels in the pyramid will receive less energy. The lower levels in the pyramid will have less predation. The higher levels in the pyramid will receive no energy at all. The lower levels in the pyramid will receive less energy.