While biology has many concrete principles and established facts, it is far from cut-and-dried. Here's why:

* Complexity: Living organisms are incredibly complex systems. Understanding them requires a multifaceted approach that considers interactions between genes, cells, tissues, organs, and the environment.

* Individual variation: No two organisms are exactly alike. Even within the same species, there's a huge range of variation in genetics, physiology, and behavior.

* Evolutionary change: Life constantly evolves, making biology a dynamic field. New discoveries and insights are constantly changing our understanding.

* Ethical considerations: Biology often intersects with ethical questions about human health, the environment, and biotechnology. These considerations add a layer of complexity beyond pure scientific inquiry.

Biology is a science that requires ongoing exploration and discovery. It's a field where new questions arise as quickly as answers are found.