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

Help, A rock weighs 33.6 N on Planet X and 49 N on Earth. What is g on Plan...

A rock weighs 33.6 N on Planet X and 49 N on Earth. What is g on Planet X?

To show that expired air contains carbon dioxide, To show that expired air ...

To show that expired air contains carbon dioxide The two flasks are linked so that when you breathe by the T piece, all the air bubbles by the lime water in the flasks. One tub

Control of environment : water, Water: We all know  that safe drinking ...

Water: We all know  that safe drinking water is essential for good health. Many of  the diseases in our country are  due to lack of supply of safe drinking water. ~nfortunatel~

Explain ketones, Explain Ketones The ketone bodies accumulate in the bl...

Explain Ketones The ketone bodies accumulate in the blood in impaired glucose metabolism as in starvation and diabetes mellitus. The high levels of ketone bodies are excreted i

Sense organ, when one moves from bright to dark place, chairs are not seen ...

when one moves from bright to dark place, chairs are not seen at ones. why?

Digestive system, size and length of val vulae connenvitis

size and length of val vulae connenvitis

Saturated zone of groundwater called, What is the upper surface of the satu...

What is the upper surface of the saturated zone of groundwater called: The Water Table

Determine about the soil humus, Determine about the soil humus The orga...

Determine about the soil humus The organic constituents (organic colloids) are due to mainly the plants and partly the animals.  They form only a small fraction and get transfo

Define the term amplitude, Define the term Amplitude In simpler terms, ...

Define the term Amplitude In simpler terms, amplitude is the amount or relative value of a signal. Amplitude is measured in units of pressure e.g. Newtons/sq. m. But what is ph

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