What is the highest level of organization in biological structures?

The highest level of organization in biological structures is the organism. This level encompasses all other layers of biological organization, including cells, tissues, and organs. Specifically, an organism consists of various organ systems that work together to maintain life and facilitate functions necessary for survival, such as reproduction, growth, and homeostasis.

In biological hierarchy, cells are the basic units of life and can combine to form tissues. Tissues then organize to create organs, each with specific functions essential to the organism's overall health and functionality. However, it is at the organism level where all these components come together as a complete living entity, making it the most complex and integrated level of biological organization. Understanding this hierarchy is crucial as it reflects how life is organized on Earth, from the smallest unit to the most complex systems.