Exam 23: Ecology, the Environment, and Us

How has human activity added to eutrophication of freshwater lakes?

A small woods was cleared for a new building but then the builders went bankrupt.Over the ensuing years,plants and animals moved back into the plot in a process called ________.

Match each definition in the first column to the correct term in the second column. -A lion feeds only on mammals,so would be said to be this.

The saguaro is a giant cactus that is found primarily in desert regions of Arizona.This is information about the cacti's ________.

The fly agaric,a giant toadstool,consumes dead organic material so it is said to be a ________.

What are the benefits of maintaining biodiversity?

________ is an important component of many biological molecules,including the genetic material DNA and energy transfer molecules such as ATP.

Rattlesnakes eat grain-eating rodents,so the snakes would be in which trophic level?

If you were raising frying chickens,how much meat could you produce given a metric ton (1000 kg,or 2200 lbs)of feed?

If a plant could not get enough phosphorus then it could not make ________.

Living organisms that consume plants,animals,and detritus to maintain their metabolism are referred to as ________.

Hoda,now pregnant,barbequed a shark that her uncle caught in a bay.Upstream from that bay was an old coal mine that was draining into the local river.What should you warn Hoda about?

Match each definition in the first column to the correct term in the second column. -Most of the non-cycling carbon is in this form.

A backhoe operator is helping to clear land that will be used for a poultry farm when the equipment opens up a hidden chamber in which old electrical transformers have been buried.The operator knows that transformers contain PCBs.Why should this person warn the owners of the land?

Match each definition in the first column to the correct term in the second column. -Yeasts consume garbage and other dead organic matter so they are called this.

The Humboldt Current,a river of cold water running deep beneath the Pacific Ocean,sweeps eastward toward the South American coast until it hits the coastline where it is forced upward near the surface.Deep sediments come up along with the cold water.Predict what you would find along that coast.

Ammonium is converted to nitrates (NO3-)by this process.

Why is it wiser to eat a diet with more plants in it than one with more meat?

All the potentially interacting species in an ecosystem are said to make up a(n)________.

Match each definition in the first column to the correct term in the second column. -The study of the relationships between organisms and their environment.