Mutation are random, add new genes, are changes in the organisms DNA, and some can be rare, whether or not they delete genes is unknown to me. Be sure to check yourself. Hope this helps :)
Answer: A animals biome affect how it lives biomes are largely determined by climate, which is a function of many variables; but moisture and temperature are two key factors. ... Each species is adapted to the biome it is best suited to and this is a kind of "weeding out" process - or survival of the fittest in any given biome.
