Cell Structure and Function Overview — AP Biology
1. Unit at a Glance
This unit follows a logical sequence from the basic evolution and organization of cells to their specialized internal structures, and finally how they exchange materials with their environment. We start with how cells evolved to separate and organize their functions, then move to the relationship between cell size and efficiency, before diving into membrane structure and transport.
Every topic in this unit connects back to the core biological theme: form fits function. Understanding how cell components work together to maintain homeostasis is key to mastering this material for the AP exam.
Common Pitfalls
Why: Both are endosymbiotic organelles, so students often mix their core roles
Why: As cell size increases, volume grows faster than surface area
Why: Students often forget the specific definition of osmosis