I know that they need air to live
Answer: It depends on if your only talking about plants if so the answer is coal.
Explanation: The reason being because coal only forms from the compaction of dead plants whereas petroleum forms from compacted plants and animals.
<span>The most important role of this peculiar double helix structure of DNA is to facilitate replication....in preparation of cell division each of the 2 strands acts as a template thus facilitating precise copying of genes....in the Nature(1953), </span>