Palaeontological evidence, Science

Assignment Help:

Palaeontological Evidence:

Palaeontology  is a branch of  earth sciences, which is essentially a study of plant and animal life in the past geological periods, millions of years ago. It deals with  the successive plants and animals which have inhabited the earth since the earliest times, Evidence of  their existence is left in the form of  skeletons and bones buried in the rocks. These are known as fossils. Crucial evidence of  human evolution is provided by the study of  these fossils. 

Sometimes,  the buried body and the skeleton of  an animal disintegrate  entirely. If the surrounding material is sufficiently firm, a cavity may remain, having the exact outlines of the structures that disappeared. Such a cavity is called mold, Similar to molds are the impressions. These are left by extinct objects or parts of  the body upon the surrounding  material. The impression is made while the surrounding material is soft, like footprints in clay or lava.  Footprints of extinct animals are also impressions affording  valuable information about the animals that made them. 

It  is important to mention here, that early human fossils that have been found are generally fragmentary and incomplete. This is because only during the last 50,000 years or so, man started burying his dead. These later fossils are better preserved and, therefore, give us more information. For the earlier period, parts of bones are often the basis of imagining the re-construction of  the whole skeleton. The finding of fossils deposits  is both a matter of chance and of  deliberate excavation in certain regions of the earth.  


Related Discussions:- Palaeontological evidence

What is heart sounds, What is Heart Sounds? Have you ever heard your h...

What is Heart Sounds? Have you ever heard your heart go lub...dub...? What are these sounds? "Lub" is the closing of the atrioventricular valves while "dub" is the closing of

Solid object.., what are the different kinds of solid object?

what are the different kinds of solid object?

Soil, why is oxygen is important to plants?

why is oxygen is important to plants?

Find the initial and final values , Please complete this assignment in Micr...

Please complete this assignment in Microsoft Word and turn it in as an attachment. Show all work to receive full credit. 1. Given e sw = 57mb and r = 0.5, find T LCL . 2

Greenhouse effect, Greenhouse effect: Scientists  have reason to believ...

Greenhouse effect: Scientists  have reason to believe that air pollution. both due to carbon particles or soot and carbon dioxide would affect weather. A rise in surface temper

Which of the following would NOT affect gass exchange?, A) thickness of the...

A) thickness of the respiratory membrane B) gas concentration gradients C) decrease in pulmonary ventilation D) lung surface area E) no exceptions

PLEASE HELP, What are famous life scientist and what did they discover?

What are famous life scientist and what did they discover?

Studying the main parts of a flower, Studying the main parts of a flower ...

Studying the main parts of a flower Examine specimens of large simple flowers such as "tulips or lilies". Count the stamens & observe how they well arranged about the central p

Explain the small intestine, Explain the Small Intestine The small inte...

Explain the Small Intestine The small intestine is continuous with the stomach at the pyloric sphincter and leads into the large intestine at the ileocdic valve.  It is about 2

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