1.   All the different complex organic molecules work together to form the entire organism.

2.   But although organic molecules are the essential components of modern living things, they can not in isolation be considered living.

3.   Chemists now know how to make most organic molecules in the laboratory, but the name has stuck.

4.   Geologists believe that oil and coal are composed of organic molecules because they themselves are derived from living things.

5.   One idea that has been suggested is that the precursors of life - complex organic molecules - arrived here from outer space.

6.   Tannins, another kind of organic molecule, are used in the oil industry to make muds easier to drill.

7.   We know, too, that meteorites often do contain complex organic molecules.

8.   When this happened, say Hoyle and Wickramasinghe, the organic molecules within the comets were spewed out over the land.

9.   Amino acids, like many organic molecules, come in two mirror-image forms that scientists term right-handed and left-handed.

10.   And such planets could be warm enough to have water in liquid form, which is considered a requirement for chemical processes creating organic molecules associated with life.