Evolution is based on mutation of an existing organism
Mutations Are Typically Harmful, Sometimes Neutral and Are Rare
Creationists and even many evolutionists immediately pointed out that all observed mutations whether laboratory induced or occurring naturally have typically been harmful, or in some cases neutral. Mutations are typically a copying error or mistake, which cause things like disease or monstrosities and put the organism at a disadvantage. In addition, mutations have been discovered to be an extremely rare event since genes have built in functions to stabilize and resist change. So in other words, mutations are rarely seen and when they do occur, they they do not bring out an advantage to any living thing. Evolutionists like to use examples of beneficial mutations in antibiotic resistance to bacteria, or in mutation of the tomato for example, though none of these types of mutations are relevant to any ideas about one kind of creature changing into another. One kind of creature changing into another via beneficial mutation has simply NEVER been shown.
For evolutionists to state that many favorable, random mutations have occurred is completely unfounded. Mutations simply cannot be the cause for evolution into new, healthy, more complex living organisms. Again, many evolutionists simply state this fact is not true, when proof is everywhere. These evolutionists are simply in denial.