For those who are finding it hard to comprehend the transformation from Ape to human.
The appendix in the humman is an irellavent organ, in an Ape it is used helping break down leaves and vegitation.
The bone on the lower back upper bum, is a "broken bone" and is only a tiny stump. In the exact same spot on an Ape it is where the tale is located.
We share 99% of the same DNA with the common Ape.
There are a million more reasons, the evidence is overwhelming.