You Go on a Canoe Trip to the Boundary Waters

question 61

Multiple Choice

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 pike. You know that walleye like to eat minnows. In turn, the minnows feed on scuds (zooplankton) , which eat algae (phytoplankton) .
-Walleye pike tend to live in deep waters and feed at night.Northern pike live in shallower waters and feed all day.Which of the following best explains these differences?

• A) mutualism
• B) predation
• C) parasitism
• D) commensalism
• E) competition

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