Another terrier to add to the list of low-cost dog breeds. These guys are gentler and less excitable than most other terriers. If you want minimal grooming and walking, the Glen of Imaal Terrier will be a good fit for you. They are another small dog with minimal shedding making for cheap clean up and low cost grooming.
(plural vestigial structures). ( 1 biology) A structure in an organism that has lost all or most of its original function in the course of evolution, such as human appendixes. 2  Link/Cite. 3  Home. 4  Dictionary Definitions. 5  vestigial-structure.
Evidence for Evolution. Vestigial structures are considered one of the pieces supporting the theory of evolution, which states that organisms change over time. To explain why vestigial structures are important to the theory of evolution, let's use the vestigial structure of the whale to illustrate this concept. By looking at fossils, scientists have found several whale ancestors that suggest whales once lived on land over 50 million years ago.