(N/A) $\Rightarrow$ The unique phenomena of life in living organisms are possible due to interactions within their bodies.
$\Rightarrow$ The properties of tissues are not present in the constituent cells but arise as a result of interactions among the constituent cells.
$\Rightarrow$ Similarly,the properties of cellular organelles are not present in the molecular constituents of the organelle but arise as a result of interactions among the molecular components comprising the organelle.
$\Rightarrow$ These interactions result in emergent properties at a higher level of organization.
$\Rightarrow$ This phenomenon is true in the hierarchy of organizational complexity at all levels.
$\Rightarrow$ Therefore,living organisms are self-replicating,evolving,and self-regulating interactive systems capable of responding to external stimuli.
$\Rightarrow$ Biology is the story of life on Earth and the story of the evolution of living organisms.
$\Rightarrow$ All living organisms—present,past,and future—are linked to one another by the sharing of common genetic material,but to varying degrees.