How do you think vestigial structures came about?

Answer and Explanation:

Vestigial structures are those that have in the course of time ceased to be functional and therefore have become reduced in size or are rudimentary. Example is the appendix which  in humans has no digestive function, a vestigial tail present in humans in form of much-reduced coccyx.

emerald ash borer

the emerald ash borer is a green buprestid or jewel beetle native to north-eastern asia that feeds on ash species. females lay eggs in bark crevices on ash trees, and larvae feed underneath the bark of ash trees to emerge as adults in one to two years. hope this !