A webpage giving an overview of ecology. Learn about the biotic and abiotic factors that make up an ecosystem as well as the different levels of ecology.

Practice what you've learned about cross-price elasticity of demand in this four-question exercise.

Practice what you've learned about income elasticity of demand in this four-question exercise.

Practice what you've learned about how to calculate the consumer price index and the rate of inflation, as well as the limitations of the CPI in this exercise.

Practice what you have learned about total utility, marginal utility, total revenue, and costs in this four-question exercise.

Practice what you've learned about consumer and producer surplus in this four-question exercise.

Practice your understanding of how exchange rates change when economic conditions change.

Practice what you learned about economic growth in this four-question exercise.

Practice what you have learned about the law of demand, the income and substitution effect, and changes in demand in this seven-question exercise.

Practice what you've learned about demand, quantity demanded, the determinants of demand in this four-question exercise.

Practice and gain better understanding of the money supply and the purpose of money.

Test your knowledge about different types of financial assets.

Practice what you have learned about identifying externalities and using graphs to identify both market equilibrium and socially optimal outcomes in this exercise.

Practice what you've learned about positive externalities and negative externalities in this exercise.

Practice what you've learned about calculating, applying, and interpreting the expenditure multiplier and tax multiplier in this four-question exercise.

Practice what you know about exchange rates in this exercise.

Practice what you've learned about modeling a short-run macroeconomic equilibrium in this exercise.

Practice what you have learned about productive efficiency and allocative efficiency in perfect competition in the short run and the long run.

In this exercise, review the purpose and intent of fiscal policy to get you warmed up for more challenging questions.

The Ebola disease is a life-threatening illness caused by the Ebola virus. There is currently no vaccine or specific medication for Ebola. Further discussion includes How does the virus replication work?; What are the symptoms of Ebola...

Antibiotic resistance describes a bacteria's ability to survive while being exposed to antibiotics. Topics explored are the following: How does antibiotic resistance develop exactly?; How do we measure antibiotic resistance?; How...

An overview of antibiotics, including What are antibiotics?; How were antibiotics discovered?; How do antibiotics work?; Azithromycin; Antibiotic development?

Use these practice questions on celiac disease to review for the NCLEX-RN test.

Use these practice questions on delirium and dementia to review for the NCLEX-RN test.