The Fossil Record

If evolution is true there must be two lines of evidence: (1) the fossil record must produce vast numbers of transitional forms (2) there must be a mechanism to cause all these changes - Where are all the transitional forms between the Procambrian and Cambrian periods? - How well do some of the famous alleged fossil intermdiates such as the horse and archaeopteryx hold up to unbiased scientific investigations? - Do mutations and natural selection support evolution?