Energy and Matter, interactions

what does life require

requires energy transfer and transformation

flows and cycles

energy flows but matter cycles

biological systems

biological systems interact with one another and the environment

feedback

positive and negative feedback loops for feedback regulation

evolution as a core theme

evolution explains unity and diversity of life

central mechanism of evolution

charles darwin natural selection

relationships represented by

evolutionary relationships are represented by phylogenetic trees

biology and the scientific method

making observations, forming hypothesis, testing predictions

hypothesis?

hypothesis must be testible and falsifiable

theories?

theories are broader and supported by substantial evidence

biology and society

understanding biology gives solutions for crucial problems in society