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

Utilitarianism - philosophical medical ethics, There is something very attr...

There is something very attractive about the straightforward idea that morality is all about maximising happiness and minimising misery: that one's actions are right insofar as the

How to organise an interaction session, HOW TO ORGANISE AN INTERACTION SESS...

HOW TO ORGANISE AN INTERACTION SESSION: How should we begin? What are the norms? What is the time slot? Any assessment criteria? These and many such questions may be coming to you

Hard and soft water in cleaning, Hard and soft water in cleaning Prepar...

Hard and soft water in cleaning Prepare two samples of dirty cloth. Wash one in soft water with soap unless it is clean. Wash the other cloth in hard water for the similar leng

How do microbes enter our body?, How do Microbes Enter Our Body? You ha...

How do Microbes Enter Our Body? You have learnt that microbes exist virtually everywhere,  and hence our body is constantly exposed to them. They gain access  to our body throu

Historic mineral that was the original source of radium, Give the common na...

Give the common name of the historic mineral that was the original source of radium and the first substance in which helium was discovered on earth: Pitchblende

Explain the menstrual phase - menstrual cycle, Explain the Menstrual Phase ...

Explain the Menstrual Phase - Menstrual Cycle If the ovum is not fertilized, a high level of progesterone in the blood inhibits the activity of pituitary gland and the producti

Define the term - irrigation, Define the term - Irrigation Irrigation ...

Define the term - Irrigation Irrigation may be defined as the process of artificially supplying water to soil for full-fledged nourishment of the crops." In other words, it is

Determine the quantity of leachate that generated each year, 1. If the land...

1. If the landfill had a compacted density of 600 Kg/m3 a refuse  depth of 9 m (29.5 ft), a moisture content of 20% by volume, and a 1-m  (3.25-ft)-thick clay cover with a 2% slope

ADVANCEMENT , how communication can bring about advancement in any society....

how communication can bring about advancement in any society..

The survey committee recommendations, The Survey Committee Recommendations ...

The Survey Committee Recommendations The Survey Committee, consisting of the following three members, surveyed Chemistry1 Physics/Botany/Zoology laboratory for identifying unse

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