Biological classification (taxonomy) is the process of organizing living organisms into groups based on shared characteristics and evolutionary relationships. Scientists...

Evolution is the central concept that unifies all of biology. It explains how living organisms change over time and how...

The human body is made up of organ systems—groups of organs that work together to perform specific functions. These systems...

What You’ll Learn The structure and roles of DNA and RNA The steps of protein synthesis (transcription and translation) The difference between mitosis...

This comprehensive study guide dives into the essential topic of cell structure and function—a cornerstone of HESI A2 Biology and...

Biology is a fundamental part of the HESI A2 exam, covering cells, genetics, metabolism, microbiology, and human biology. This study...