HCU MCA 2014 Paper

Read the following passage and answer the23-25 based on this passae by choosing themost suitable answer to the question:
Natural selection cannot possible produce any modification in a species exclusively for the good of another species though throughout nature one species incessantly takes advantagcof, and profits by, the structures of other. But natural selection does often produce structures for the direct injury of other animals, as wc see in the fang of the adder. If it could be proved that any part of the structure of any one species, had been formed for the exclusive good of another species, it would annihilate my theory. It is admitted that the rattle snake has a poison fang for its own defence, but some authors suppose that at the same time it is furnished with a rattle, to warn its prey. I would almost as soon believe that the cat curls its end of its tail when preparing to spring, in order to warn the doomed mouse. It is a much more probable view that the rattle snake uses its rattle, in order to alarm the many birds and beasts which are known to attack even the most venomous species. (Charles Darwin in The Origin of Species.)