Exam 38: Communities and Ecosystems

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?

The reliance of a plant on one type of insect for pollination and that insect having only the nectar of that plant as its food source is an example of coevolution.

The total of all the resources,both biotic and abiotic,a species exploits for its survival,growth,and reproduction is its

The ecosystem that would most likely have a very high net primary productivity is a

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). -Zooplankton are which of the following?

How was the virus detected?

Nitrogen-fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants and,in exchange obtain food from the plants.Which reaction can these bacteria catalyze?

A state or national park in your area conserves natural wildlife and plant florae in a community that remains fairly constant over time.This is an example of _____.

Secondary consumers are

An organism's _____ is its position in the food chain,relative to the ecosystem's energy source.

A species that is so important to its community (such as the sea otter)that their removal can dismantle a food web is termed a _____ species.

The species that appear in a climax community usually are short-lived,early-maturing,r-selected species that are strong competitors in a changing environment.

A genetic change in one species that selects for a subsequent change in a different species is termed

If there are 10,000 calories of net primary productivity in a field,how much on average will be available to a secondary consumer?

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). -Mercury released from coal burning power plants would be at the highest concentration in