<span>Pioneer community can be refers to a community of spices that
first colonize an area during primary succession. This group of organisms are
among the first to arrive at a new site and perform a unique services by
preparing a habitat for later species. </span>
RNA is formed by a single strand of nucleotides and not a double helix like DNA; RNA, as a protein, but not as DNA, can catalyze important biological reactions. The RNA molecules that function as enzyme proteins are called ribozymes.
