In this article, Endosymbiosis: AP® Biology Crash Course, we will start by reviewing the theory itself. We will then present the evidence that scientists have collected in support of the theory. Finally, we will go over a free response question that was seen on the 2011 AP® Bio exam.
The AP® Psychology exam focuses not only on how adults think and act, but also how children develop and come into their own identities. A crucial part of identification is gender typing.
The AP® US History exam covers centuries of topics, policies, trends, and events, and you need to have a solid working knowledge all of them in order to score well. However, you don’t need to be an expert on every battle, law, and political debate. The most important things to know on each topic for the APUSH test are what it is, its historical context or setting, and why it is important in the scope of US History. In this AP® US History crash course, we will review those aspects of Open Door Policy.
Human populations have moved and settled in many locations over a long period of time. That movement or migration raises several questions for students of human geography. What makes up a population?
Are you getting ready to take the AP® Psychology exam? Are you nervous about keeping all those pesky neurotransmitters straight? Have no fear, because the ultimate AP® Psych guide to neurotransmitters is here.
When you hear the word dehydration, you undoubtedly think back to the last time you felt thirsty, dizzy, and generally off after a major loss of water (and insufficient water intake). Though we typically view the word dehydration in a negative light, the concept of dehydration synthesis is extremely valuable at the molecular level.
Proteins, along with carbohydrates and lipids, are a type of organic macromolecule that is a fundamental building block of life. While you hear a lot about proteins in daily living – like in ads for protein shakes and protein powders– there are a few misconceptions about why proteins are important and how they work.
Economists use different terms for different measures of the money supply; specifically, they will refer to M1, M2, and M3. So, what are M1, M2, and M3, and how does it apply to the supply of money? In this crash course review, you’ll find out exactly what M1, M2, and M3 are, and you’ll learn how they apply to concepts that you’re used to, such as currency or checkable deposits.
There are many serious challenges facing countries today. History shows us that those challenges can and do lead to civil unrest, protest, and armed conflict. Those challenges are rooted in history and countries (also called states) must deal with the boundaries left to them by past generations.
In the modern era, we’re accustomed to the ups and downs of the economy. In AP® US History, you’ll also learn that those ups and downs aren’t new at all. In fact, economic changes have impacted politics from the Revolutionary War era onward. During the Revolutionary War, the United States steadily accumulated debt, which eventually led to a financial crisis. At this time, the country did not have a centralized government strong or effective enough to tackle this obstacle.