Here I show how creationists are wrong when it ... (more) Added: January 04, 2007 Here I show how creationists are wrong when it comes to MacroEvolution (MaE). MaE is defined as evolution at or above the species level. This means MaE includes speciation. Despite what creationists say there are examples of new species occurring in nature, and scientists have produced new species in the lab. Many creationists claim that MaE means there must be a huge change in appearance. This is false. Many sister species, existing in the same genus and the cases we have of new species occurring in nature, share many characteristics. A new species of mosquito will still resemble a mosquito, and a new species of worm will still resemble a worm. Only after many speciation events will large changes begin to accumulate. This may take tens to hundreds of millions of years.
Many ID/creationists do accept MicroEvolution (MiE), but claim MiE is different from MaE. Here I show how a MiE step can lead to a MaE event through the evolution of the sperm egg receptor ligand complex. A species is best defined as a group of organism that can successfully produce fertile offspring. Once the sperm of one population can no longer fertilize the eggs of another population and vice versa, we have two species.
Finally, many creationists claim that there is not enough variation within a species to allow for the large changes in phenotype (appearance). Anyone who claims this has obviously never seen the myriad of dog breeds, all of which were derived from the same species, wolf.
My point here is, MacroEvolution includes speciation, and speciation has been observed in nature and in the lab. Also, MicroEvolutionary steps can result in speciation. Scientists do not doubt MacroEvolution, but they do debate how and under what circumstances it occurs.