Insufficient, expecially when it comes to the higher species. For example, evolutionists now say that the ancestor of both man and monkey is some 10 million years in the past. Now that sounds like a long time but it is only about a million generations. Now how many individuals do you wish to count in each generation? Let's be over generous and say there were a billion each generation. So that gives you 10 to the 15th power of opportunities for getting a new functional gene. The chances for a random creation of a small functional gene are greater than 1 to the 65th power. Of course there is always the chance of a lucky strike at the beginning so one gene would be possible though somewhat improbable. However the difference between man and monkey is 2% of the genes. That sounds small but it means some 600 genes. Since even one new gene in 10 million years is improbable, 600 is a complete impossibility.