vestigial
refers to an organ or part (for example, the human appendix) which is greatly reduced from the original ancestral form and is no longer functional or is of reduced or altered function.
Vestigial structures provide a clue to the evolutionary history of a species because they are remnants of structures found in the ancestral species.
Freshwater ecosystem is comprised of four major constituents, namely elements and compounds, plants, consumers, and deco..
This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..
This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..
This tutorial looks at the mutation at the gene level and the harm it may bring. Learn about single nucleotide polymorph..
The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..