Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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 .
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.
Stereo isomerism:- Stereo isomerism occurs when the same compound due to different spatial arrangement of the groups attached to its asymmetric carbon atom exists in m
1. Describe the paths of water through the hydrologic cycle. Explain the processes and the energy gains and losses involved in the changes of water between its 3 states. Operatio
difference between autotrophic and heterotrophic succession
Personal sensitivity : There are other dangers from substances which are not so common. e.g. mutagens , but one aspect we have not mentioned involves you. The eyes, lungs and skin
Microwave Processing Factors Frequency: There are two available frequencies for microwave heating - 915 and 2,450MHz; the frequency affects the depth of penetration into
Explain the Types of White Blood Cells White blood cells are actually a whole collection of different cells that work together to destroy bacteria and viruses. You may recall s
Mr. X was administered the Personality Assessment System (PAS), which is an individually-administered assessment of a person's personality structure and function. His total P score
characters of chordates
List any three human activities that you think would lead to air pollution. The following three human activities would lead to air pollution: (i) Burning of fossil fuels such
what are the measurable causes of weather and how does weather impact our world?
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd