Use the Following Information to Answer the Following Questions

question 21

Multiple Choice

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) ________.

• A)population
• B)community
• C)ecosystem
• D)population and community

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Definitions:

Decreases

A reduction in quantity, size, value, or extent of a specific economic variable or commodity.

Expected Price Level

The anticipated average price across all goods and services in an economy over a future period.

Aggregate Demand

Unified request for the provision of goods and services in an economy, calculated at a specific scale of overall price for a given duration.

Aggregate Supply

The total supply of goods and services that firms in an economy are willing and able to sell at a given price level in a specific time period.