Both theories linked to each other in issue of appear/origin of life.
Some people used to combine evolution and abiogenesis thoeries to discuss origin of life.
Some people consider abiogenesis is part of evolution.
Cambrian explosion discuss by both.
"Some people" - do you have any evidence for this? Are you making it up?
As for the Cambrian Explosion, what do you think of the increasing evidence for Precambrian Metazoa? Don't you think it rather invalidates the popular perception of the period as one of such explosive biological diversification? Especially when combined with the dearth of pelagic diversity during the period?