Some of the common challenges that all organisms face are-
a) Feeding themselves - All living organism need food and thus finding appropriate food for feeding themselves is a every day challenge. As most of the species feed by preying, therefore they have to spend a large part of their day in hunting only.
b) Reproduction - All organisms are able to reproduce but identifying a right mate for intercourse is a big challenge.
c) Waste removal is yet another challenge for a living organism. Waste cannot be removed at any place and hence finding an appropriate location for waste disposal is a big challenge.
A very small portion of colorectal cancers are caused by inherited gene mutations. Many of these DNA changes and their effects on the growth of cells are now known. For example: Familial adenomatous polyposis (FAP), attenuated FAP (AFAP), and Gardner syndrome are caused by inherited changes in the APC gene.
