Fossils help us reconstruct plant and animal life in the past as well as their evolutionary processes, which can be either slow or rapid. Place in order the following images that demonstrate a possible evolutionary progression of a small population of snails.
1) population becomes isolated
2) after rapid change in isolated population
3) reintroduction
4) stasis

According to the rna world hypothesis, rna acted as the genetic material and catalyzed reactions in ancient cells. what conclusion can you draw from this?               a.  this implies that dna and proteins aren't essential in cells today.    b.  this implies that rna can catalyze any chemical reaction that enzymes catalyze.    c.  this implies that if a cell has a problem with its dna, its rna can compensate for the damaged dna.    d.  this implies that dna and proteins evolved after rna.