Exam 20: Communities and Ecosystems

As a result of a severe disturbance,a community will ________.

Use the following information to answer the following questions. Malaria is an infectious disease caused by a unicellular eukaryotic organism belonging to the genus Plasmodium. These eukaryotic organisms are transmitted from one person to another by the female Anopheles mosquito when it feeds on human blood. Within humans, the Plasmodium species destroy red blood cells and, without effective treatment, serious infections can lead to death. Currently, more than 400 million people are afflicted with malaria and between 1 and 3 million people die from it each year. Historically, a chemical compound called quinine has been used in developing effective drugs against malaria. In its natural environment, quinine is produced by certain trees native to South America. This chemical is synthesized in the outer layer of tree trunks and acts as an herbivore deterrent. -Despite being used for many years,quinine-based drugs have not led to the eradication of malaria and currently there are parasites that are resistant to the compound.Which of the following were likely important in the development of this resistance to quinine?

The rate at which an ecosystem's producers convert solar energy to chemical energy stored in biomass is called ________.

Populations of two coexisting species are both tertiary consumers in a community.What relationship may exist between these two organisms?

Which of these convert organic matter to inorganic matter by breaking down dead organisms?

In Yellowstone National Park,wolves were hunted to extinction in the 1920s.A current restoration project has reintroduced wolves to Yellowstone National Park.Predict the response of the Yellowstone ecological community if wolves are a keystone species.

Organisms that consume producers are ________.

E.O.Wilson coined the term ________ for our innate appreciation of wild environments and living organisms.

Herbivory is an example of a ________ interaction.

On average,what percentage of the energy in one trophic level becomes incorporated into the next higher trophic level?

Use the following information to answer the following questions. Malaria is an infectious disease caused by a unicellular eukaryotic organism belonging to the genus Plasmodium. These eukaryotic organisms are transmitted from one person to another by the female Anopheles mosquito when it feeds on human blood. Within humans, the Plasmodium species destroy red blood cells and, without effective treatment, serious infections can lead to death. Currently, more than 400 million people are afflicted with malaria and between 1 and 3 million people die from it each year. Historically, a chemical compound called quinine has been used in developing effective drugs against malaria. In its natural environment, quinine is produced by certain trees native to South America. This chemical is synthesized in the outer layer of tree trunks and acts as an herbivore deterrent. -Humans,mosquitoes,and Plasmodium together would be considered a(n)________.

Modern conservation science increasingly aims at ________.