Test Prep

Introduction Energy is an essential force that drives all life on Earth. To understand ecosystems, … Read more

Understanding how organisms respond to their surroundings is key to success in AP® Biology. This … Read more

Understanding how life began on Earth is a key topic in biology. This question has … Read more

Introduction Genetic diversity is vital in biology because it helps populations adapt to changing environments. … Read more

Scientists define extinction as a critical concept in biology because it shapes the diversity of … Read more

Speciation is a core concept in evolutionary biology and a crucial topic for AP® Biology … Read more

Phylogenies can look intimidating at first. However, understanding them is crucial for success in AP® … Read more

Antibiotics have been a cornerstone of modern medicine for decades. They serve as powerful tools … Read more

Introduction Common ancestry is a core concept in evolutionary biology. It describes how different species … Read more

Evolution offers a powerful explanation for the diversity of life on Earth. This topic is … Read more