Adna molecule is shaped like a
a. long, thin rod.
b. spiral staircase.
c. straight ladder.
d. triple helix.

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes