What is the biological definition of life?
What is the definition of biological method observation hypothesis experiment deduction and universal law?
Branches of biological science and their definition?
What is a science definition of a biological property?
Do all life forms contain carbon?
That is impossible to determine, given a lack of definition for life and our ignorance of life forms alien to this planet. the only certain thing is that we're all full of space. We're made up of more space than water or carbon. The biological definition of "life" (metabolism, reproduction, growing, movement, excitability) does not require that the creature contains carbon, however all creatures that are life according to it do.