Now the opponents of the scenario point out that most known mutants are creatures with seven heads growing out of paws and similar monstrosities.
The opponents' statement above is only true to the extent that we use the comic book definition of mutant. Using that definition, mutants means creatures that are hugely different from their parents. If we instead define mutant to mean a life with a mutation of significance with respect to fitness, then most mutants are not monsters.
Could there are be an environment they are the fittest for?
Obviously, some mutations cannot survive in any environment that they could realistically be found in. But we would imagine, for example that a mutation that involved external coloration might cause a creature to stand out in some environments while keeping the creature hidden from prey or predators in another.
Edited by NoNukes, : No reason given.
Under a government which imprisons any unjustly, the true place for a just man is also in prison. Thoreau: Civil Disobedience (1846)
The apathy of the people is enough to make every statue leap from its pedestal and hasten the resurrection of the dead. William Lloyd Garrison.
If there is no struggle, there is no progress. Those who profess to favor freedom, and deprecate agitation, are men who want crops without plowing up the ground, they want rain without thunder and lightning. Frederick Douglass