What is the approximate percentage of water in the composition of a living organism?

Which method involves the application of centrifugal force on molecules?

Which atoms are primarily present in organic compounds?

Elemental analysis gives elemental composition of living tissues in the form of $P$,while analysis of chemical compounds gives an idea of $Q$ present in living tissues.

What do living organisms obtain from the environment to synthesize the essential components required for their bodies?

Biomolecules include ......... .