Ad
related to: vestigial organs in plants worksheetteacherspayteachers.com has been visited by 100K+ users in the past month
- Free Resources
Download printables for any topic
at no cost to you. See what's free!
- Worksheets
All the printables you need for
math, ELA, science, and much more.
- Free Resources
Search results
Results from the WOW.Com Content Network
Vestigial organs are common evolutionary knowledge. [2] In addition, the term vestigiality is useful in referring to many genetically determined features, either morphological, behavioral, or physiological; in any such context, however, it need not follow that a vestigial feature must be completely useless.
Ileum, caecum and colon of rabbit, showing Appendix vermiformis on fully functional caecum The human vermiform appendix on the vestigial caecum. The appendix was once believed to be a vestige of a redundant organ that in ancestral species had digestive functions, much as it still does in extant species in which intestinal flora hydrolyze cellulose and similar indigestible plant materials. [10]
The existence of vestigial organs can be explained in terms of changes in the environment or modes of life of the species. Those organs are typically functional in the ancestral species but are now either semi-functional, nonfunctional, or re-purposed. Scientific literature concerning vestigial structures abounds.
The young Robert Ernst Eduard Wiedersheim, probably in early 1874 by Alfredo Noack in Genoa. [1]Robert Ernst Eduard Wiedersheim (21 April 1848 – 12 July 1923) was a German anatomist who is famous for publishing a list of 86 "vestigial organs" in his book The Structure of Man: An Index to His Past History.
Pages in category "Vestigial organs" The following 12 pages are in this category, out of 12 total. This list may not reflect recent changes. ...
Plant structures or organs fulfil specific functions, and those functions determine the structures that perform them. Among terrestrial (land) plants, the vascular and non-vascular plants (Bryophytes) evolved independently in terms of their adaptation to terrestrial life and are treated separately here (see Bryophytes). [6]
In many plants, defensive or storage structures are made by modifications of the development of primary leaves, stems, and roots. Leaves are variously modified from photosynthetic structures to form the insect-trapping pitchers of pitcher plants , the insect-trapping jaws of the Venus flytrap , and the spines of cactuses , all homologous.
This page was last edited on 23 May 2007, at 10:34 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply ...
Ad
related to: vestigial organs in plants worksheetteacherspayteachers.com has been visited by 100K+ users in the past month