The Albert Team 
Our cells have no walls, as we traded in mobility for susceptibility over the course of evolution. So our immune system is there to help keep us safe. Let’s take a closer look at the workings of the immune system as far as what you’ll want to know for the AP® Biology exam.
On the AP® Biology exam, many students struggle with questions that relate to the properties of water. This topic is usually covered at the beginning of the year, and when it comes to all the information students are responsible in AP® Bio, it gets forgotten. The properties of water are essential to maintaining homeostasis, a stable equilibrium, in organisms and in the world.
Today, we’ll cover the Concentric Zone Model. When we talk about different groups of people and different parts of town as being business districts, residential districts or even working class districts, most people don’t think of them as concentric zones. Concentric zones are a model of the way that different social groups are arranged within a city, and a general representation is found in nearly all cities.
When we talk about a large city, there are various aspects to consider. The suburbs and the urban areas coexist, and that’s where the term agglomeration comes from. Located as part of the city center as well as right outside the city center, an agglomeration is a built-up area of a city region. In this AP® Human geography review, we will discuss about what agglomeration is and its importance.
AP® Art History can seem impossibly tough to review in a single month. It involves a massive amount of memorization, thousands of years of history, and some serious analysis. The sheer amount of material in art history makes it difficult to remember everything as you prepare for the AP® test. But with the right study guide and the best materials available, it can be a breeze to review AP® Art History and ace the exam.
It’s no question that the Founding Fathers played an important role in American history. When it comes to the people who did so much for the founding of our nation, how can you keep track of everything they did? Luckily for you, we have all the tools you need to master the Fathers’ contributions to the American government. In this APUSH crash course review, we will talk about one of the key documents that could appear on the AP® exam: Federalist Number 10.
Put simply, a circuit is a closed conducting wire loop with some elements in the mix, such as batteries, resistors, and capacitors. Only batteries and resistors are covered in AP® Physics 1; Physics 2 also covers capacitors. In this article, we’ll review the characteristics of circuits, resistors, and capacitors and do some example problems similar to those on the AP® Physics 1 and 2 exams.
Dollar diplomacy–aside from sounding like the name of a movie showing down the street, do you have any idea what it means? Could you explain it to a friend in easy-to-understand terms? More importantly, could you successfully answer an essay question about it on the AP® US History exam? Do you know the politicians involved or at least the associated time period and presidency? Chances are you answered no to at least one of those questions. Thankfully, we’re here to give you a crash course on dollar diplomacy and to explain everything you need to know to ace this topic on the APUSH exam.
You’ve probably heard of the Cold War, but do you know the foreign policies of the Cold War presidents, what happened during the Cold War in Asia, and how the Cold War affected the American people? Did you know that the Cold War lasted for about 45 years? This AP® US History crash course will give you everything you need to answer Cold War-related multiple choice questions and essays.
There’s a lot of information in the Advanced Placement (AP) Biology photosynthesis unit that can distract you from remembering its most important concept: the transformation of light energy into chemical energy, and then its storage in the bonds of carbohydrates.