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Our results falsify these creationist hypotheses and show that scientists currently identify many structures as vestigial in animals, plants, and single-celled organ-isms. Examples include not only organs but also cells, organelles, and parts of molecules.
Jan 1, 2002 · Vestigial organs are defined as genetically determined structures that have lost their ancestral (or salient) function. [1] [2] [3] Duckweeds, an aquatic monocot family, exhibit both these...
Sep 8, 2018 · PDF | On Sep 8, 2018, Heather F Smith and others published Vestigial organs | Find, read and cite all the research you need on ResearchGate
Throughout macroevolutionary history, functions necessarily have been gained and lost; thus, we predict vestigial structures, which are structural evidence of lost functions. Since there is no apparent reason for their existence, nonfunctional characters of organisms are especially puzzling.
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Organs often become vestigial when selection for their original function becomes relaxed. They range from disadvantageous to selectively neutral to slightly advantageous (Gould 1980). Vestigial organs may be more variable compared to the same structure in other species and may appear degenerated.
- Heather F. Smith
Aug 31, 2018 · Vestigial organs are generally defined as structures having lost their original evolutionary function. Such structures can provide insight into former evolutionary pressures and behaviors and indicate how adaptive regimes have shifted across a phylogenetic lineage through time.
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Nov 23, 2024 · 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.
