Almost all molecules in space are based on what element? Why? ...

[Beheh]

Almost all molecules in space are based on what element? Why?
 
  What will be an ideal response?

Question 2

At this time, the universe is:
 
  A) radiation dominated.
  B) quark dominated.
  C) lepton dominated.
  D) matter dominated.
  E) dark energy dominated.

[qytan]

Answer to Question 1

Carbon forms a host of chains of complex molecules, some of which are essential to life. The basic building blocks of life on Earth, such as amino acids, are all found in the giant molecular clouds, so carbon and water based chemistry conducive to life may be common on many planets forming around new stars.

Answer to Question 2

E