trezor.io
Rate this file (Rating : 5 / 5 with 1 votes)
chicken or the egg
trezor.io

Chicken Or The Egg

• Science
The theory of evolution states that species change over time via mutation and natural selection. Since DNA can be modified only before birth, a mutation must have taken place at conception or within an egg such that an animal similar to a chicken, but not a chicken, laid the first chicken egg. In this light, both the egg and the chicken evolved simultaneously from birds that were not chickens and did not lay chicken eggs but gradually became more and more like chickens over time.
However, a mutation in one individual is not normally considered a new species. A speciation event involves the separation of one population from its parent population, so that interbreeding ceases; this is the process whereby domesticated animals are genetically separated from their wild forebears. The whole separated group can then be recognized as a new species.
The modern chicken was believed to have descended from another closely related species of birds, the red junglefowl, but recently discovered genetic evidence suggests that the modern domestic chicken is a hybrid descendant of both the red junglefowl and the grey junglefowl. Assuming the evidence bears out, a hybrid is a compelling scenario that the chicken egg, based on the second definition, came before the chicken.

File information
Filename:394004.jpg
Album name:Fauna & Flora
Rating (1 votes):55555
Keywords:#chicken #egg
Filesize:42 KiB
Date added:Jul 07, 2011
Dimensions:700 x 529 pixels
Displayed:100 times
URL:displayimage.php?pid=394004
Favorites:Add to Favorites