Question

what is reproductive isolation?
prevention of gene flow between two populations due to physical or behavioral barriers
two species that are capable of producing viable hybrids through interbreeding
evolution of analogous structures not present in the last common ancestor of two species
divergence of two species from a common ancestor while in the same geographical location
two species diverging from a common ancestor due to geographical isolation

Explanation:

Reproductive isolation refers to factors (physical or behavioral) that prevent gene flow between populations. The first option correctly describes this concept. The second option is about hybrid viability (not isolation). The third option is about analogous structures (convergent evolution). The fourth option is about sympatric speciation (not isolation). The fifth option is about allopatric speciation (due to geographical isolation, not reproductive isolation).

Answer:

prevention of gene flow between two populations due to physical or behavioral barriers