It is a common fallacious argument put forward in support of creationism as opposed to evolution.
It is completely debunked by the simple fact that just because a part is necessary now, does not mean it was always necessary. A part is added because it is useful, and then later parts build on it, so that eventually the first part is necessary for all others; the otehr parts also build dependence over time, until the complexity is reached and appears irreducible.
The argument is similarly broken by the mousetrap analogy. Mousetraps were used as examples of irreducible complexity, because if you remove any part it no longer works as a mousetrap. However, as simply pointed out, removing certain parts makes a very effective catapult or a very simple tie clip.
The eye is a good example because there are living animals with eyes that represent each step in it's evolution. Human eyes also show how evolution can produce "bad" results; the retina is essentially "inside-out" - the nerves are on top and there is a blind-spot where the optic nerve leaves the eye.
psysical biologal anthropoly
No, evolution is not directional as the definition is; the change in allele frequency over time in a population of organisms. Google barnacle to see that evolution has no particular direction, but the adaption of the organism to the immediate environment.
The next stage of human evolution is called homo sapiens sapiens. More accurately, evolution has no "stages". Species names are merely labels attached to a particular morphotype - and since morphologies are continuously changing, must be considered arbitrary. Although the force of natural selection is greatly reduced in the human species, we are still evolving. However, predicting what direction our evolution will take requires the consideration of so many factors that it can't really be done.
I believe that yes you can alter human evolution not in the sense that you can change our very exsistence but in the sense that you could"ve postponed it. Such as the way we and other people interbreed some of the evolution of homo sapiens definitley formed that way but they were also already in exsistence and in competition with neanderthals. So yes I say you can alter it but no to that much of an extent.
The eye is a good example because there are living animals with eyes that represent each step in it's evolution. Human eyes also show how evolution can produce "bad" results; the retina is essentially "inside-out" - the nerves are on top and there is a blind-spot where the optic nerve leaves the eye.
Mainly because they do not understand the process of evolution, or they refuse to believe it on fundamentalist grounds.
convergent evolution
Evolution.
Museum of Human Evolution was created in 2010.
Biological anthropology is the branch of science that studies human evolution.
Human evolution started with a species fron the homo called the HOMO SAPIENS.
Daniel Lieberman has written: 'The evolution of the human head' -- subject(s): Head, Growth, Evolution, Human evolution, Biological Evolution, Growth & development
The human eye's sensitivity to wavelengths in the visual window of Earth's atmosphere is due to evolution adaptations during the development of the human eye. If infrared radiation were in abundance, then it is believed our eyes would be sensitive to infrared radiation.
the squid eye is more bigger then the human eye.
Paleoanthropology is the term that refers to the study of human fossil remains and how they relate to human evolution. This field combines aspects of anthropology and paleontology to understand the biological and behavioral evolution of the human species.
The evolution of humans is the concept that humans evolved from the same ancestors as apes and monkeys. Human evolution is the part of biological evolution concerning the emergence of humans as a distinct species. It is the subject of a broad science that seeks to understand and describe how this change and development occurred. The study of human evolution encompasses many scientific disciplines, most notably biological-anthropology, linguistics and genetics. The term "human", in the context of human evolution, refers to the genus homo, but studies of human evolution usually include other hominini, such as the australopithecine.