Three of the ideas of biology are the gene theory, the theory of
evolution by natural selection, and the proposal that the cell is the
fundamental unit of all life. When considering the question of what is
life these ideas come together, because the special way cells reproduce
provides the conditions by which natural selection takes place allowing
living organisms to evolve. A fourth idea is that the organization of
chemistry within the cell provides explanations for life’s phenomena. A
new idea is the nature of biological self organization on which living
cells and organisms process information and acquire specific forms.
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