Analogous structures are structures in an organism that have the same function as structures in another organism but have a different evolutionary origin. Analogous structures are evidence of convergent evolution, in which species evolve to become more like each other. This would occur when different species had the same evolutionary pressure, and would evolve to fill the same niche. The jointed legs of the insect and the jointed legs of the vertebrate are analogous structures. They are both used for locomotion, but evolved separately.