Question

which of these is a mechanism/are mechanisms of nonadaptive evolution?
○ gene flow
○ mutations
○ natural selection
○ mutations, genetic drift, and gene flow
○ genetic drift

Explanation:

Nonadaptive evolution mechanisms do not favor traits for survival/reproduction. Mutations introduce random genetic changes, genetic drift is random allele frequency shifts (especially in small populations), and gene flow is transfer of genes between populations—all are nonadaptive. Natural selection is adaptive, so it is excluded. The option listing mutations, genetic drift, and gene flow includes all nonadaptive mechanisms among the choices.

Answer:

mutations, genetic drift, and gene flow