evolution
provides a scientific explanation for the history of life on Earth and the mechanisms by which changes to life have occurred.
ecosystem and environmennts
All life exists within an ecosystem made up of the physicochemical environment and other biological organisms.
causal mechanisms
Life requires information flow within and between cells and between the environment and the organism.
cell
The cell is the basic unit of life.
structure dictates function
Understanding the behavior of an organism requires understanding the relationship between structure and function (at each and every level of organization)
levels of organization
Living organisms carry out t functions at many different @ levels of organization . simultaneously.
information flow
Life requires information flow within and between cells and between the environment and the organism.
matter, energy, and transformation
Living organisms must obtain matter and energy - Post Respiration from the external world. This matter and energy must be transformed and transferred in varied ways to build the organism and to perform work.
homeostasis
Homeostatis (and stability in a more general sense) maintains the internal environment in a more or less constant state compatible with life.