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.
how to do assingment phylum annelida
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
State the harmul effects of Acidity of soil Acidity of soil may have harmful effects on plants due to the effect on enzymatic changes, reduced availability of nutrients like c
TO SHOW THAT AIR HAS WEIGHT Drive a thin nail by the exact centre of a long rod such as a metre stick or a yard stick. Balance the stick by resting the nail on the rims of two
Fire Alarms : Most modern fire alarm systems are electric and can be activated from several points throughout a building. These points usually consist of glass-covered switches wh
Determine the hierarchical order of soil taxanomy Order: At this highest level of generalisation, the soils are distinguished on the basis of the degree of horizon developme
which organs are protected by the skull
alternative naturalenergyresourcebasedo on undergroundhot water source
What are covalent bonds? Covalent bonds are those in which electrons are shared by the atoms, and this sharing results in an attraction between the atoms to form a molecule. A
Explain Mouth To Mouth Respiration If no instrument is available, one's own lung may be used as a positive pressure pump. Air may be blown into the lungs of the subject by way
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