Biochemical evidence, Science

Assignment Help:

Biochemical Evidence:

As we had said earlier in section 13.2, Darwin had  recognized  that humans and the great apes shared many physical characteristics. This led him  to conclude, that humans and apes descended from a common stock. Darwin's conclusions were based on the study of fossils and the physical similarities  that he had observed. Now, a century later biochemical studies of  proteins and the genetic material-DNA  show how good his guess  was, Biochemical studies show us that, as evolution proceeds and the species get differentiated,  they accumulate changes in the structure of  their proteins and DNA. Longer the separation time, greater the changes. These changes are expressed in terms of  percent genetic distance which indicates  the proportional difference between the DNA of  the two species. Comparative studies of the proteins of  the African apes and humans showed that chimpanzees, gorillas and humans are closely related  to one another, while the Asian apes, i.e. the gibbon and orangutan were the more distant cousins of  this trio  .

 

1779_Biochemical Evidence.png

Once the Asian and African apes were considered to be closely related and it was thought that  the hominids developed from apes prior  to 15 million years ago. Biochemical evidence, however, indicates that the ape-human divergence may have been much closer to five million years and that  thc gorilla split off  first, leaving the chimpanzees and the human-like creatures to share a common ancestor briefly before separating. Ramapithecus fossil specimen found in Asia, Europe and Africa was at one time thought to be closely related  to the species of modem man. However, on the basis of biochemical evidence, it has now been  shown that  it cannot be considered a homonid, because it  lived before  the Asian apes diverged from hominids. Same is true for Sivapithecus indicus, a fine fossil specimen of which was discovered in  1980 from the foothills of  the western Himalayas in  Pakistan. 


Related Discussions:- Biochemical evidence

Understanding manufacturing methods and material choices, This project is i...

This project is intended to stimulate discussion during the lectures/tutorials on the choices of materials and manufacturing issues related to materials. We will discuss our "objec

Preparation of report for an imaginary accident, Preparation of Report for ...

Preparation of Report for an Imaginary Accident In case of serious accidents, accident report has to be sent to the Head of the Institution who may use it for official purposes

Rocks, would quartzite or sandstone break more easily. please explain

would quartzite or sandstone break more easily. please explain

Define the structure of ear - the organ of hearing, Define the Structure of...

Define the Structure of Ear - The Organ of Hearing The human ear consists of three sections: the outer ear, the middle ear and the inner ear as illustrated in Figure. The oute

Procedure for disposal op carcass, Procedure 1 . After the dissection e...

Procedure 1 . After the dissection experiment is over the dead animals are put in disposable paper bags and the bag is sealed. Animal tissues and excreta should also be put and

Police, I have 4 essay question with the answer I just need you to rewrite ...

I have 4 essay question with the answer I just need you to rewrite and paraphrase the answer I need it 12 or 2:00am is that possible ?

Heart massage for restoring circulation, Heart Massage for Restoring Circul...

Heart Massage for Restoring Circulation : In cases of breathing failure, you should check that the casualty's heart is still beating. This is especially important with victims of

Different types of nutrients, stick pictures of carbohydrates,fates,protei...

stick pictures of carbohydrates,fates,proteins,minerals&different types of vitamin containing foods

Explain extrasystole and compensatory pause, Explain Extrasystole and Compe...

Explain Extrasystole and Compensatory Pause During the relaxation period, cardiac muscle is in the relative refractory period i.e. sleeping but only just. If a sufficiently st

Explain viscosity - functions of plasma proteins, Explain Viscosity - Funct...

Explain Viscosity - Functions of Plasma Proteins Plasma proteins account for about half of the viscosity of blood, the other half being due to the blood cells. The contribution

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd