Which answer is not a mechanism for evolution?

mutations
natural selection
genetic drift
gene pool

Option D, Gene Pool

Explanation:

A Gene pool is just a data base of all available genes of any specific species with in a set of population . It no where talks about  genetic change/ evolution of an species in the population.

Mutation is the change in the base pair (nucleotide bases) of a DNA, Natural selection is the way by which an species evolve and genetic drift is the change in existing genes due to random sampling of species.  

Among all given options, option D (gene pool) is not a mechanism for evolution

Hence, option D is the correct answer.

hey, what do you need . just post the question and i may be able to you : )

blue

light-years

magnitude