@ Dr. Heinz Lycklama
Problems With the Evidence
nThe percentage
of melanics predicted by the theory did not materialize in the different areas of
England; e.g. in some areas melanism increased after the introduction of pollution control
nThe results of Kettlewell’s experiments were not as dependent on the presence of lichens as he
had thought
nLater determined that tree trunks are not the
natural resting places
of peppered moths. Moths normally rest underneath or on the side of narrow
branches
nMoths were manually placed in desired
positions for the experiments, i.e. the photographs were staged
nThis cast serious doubt on the validity of Kettlewell’s experiments