AP BIOLOGY

Detailed explanation-1: -Vestigial structures serve little or no present purpose for an organism. The human tail, which is reduced to the tailbone during development, is one example. Vestigial structures can provide insights into an organism’s ancestry.

Detailed explanation-2: -Structures that have no apparent function and appear to be residual parts from a past ancestor are called vestigial structures. Examples of vestigial structures include the human appendix, the pelvic bone of a snake, and the wings of flightless birds.

Detailed explanation-3: -Vestigial structures are anatomical structures of organisms in a species which are considered to have lost much or all of their original function through evolution.

Detailed explanation-4: -A vestigial structure is a feature that a species inherited from an ancestor but that is now less elaborate and functional than in the ancestor.

Detailed explanation-5: -Homologous structures are similar structures present in different organisms that are coming from a common ancestor. In contrast, vestigial structures are structures that are no longer useful for organisms and have a reduced size.