Question

how fossils tell us about the process of evolution

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Answer 1

Explanation:

For understanding this you have to understand 1st one techniques which we called carbon dating techinque

See as you know that there is something called as isotopes

so carbon has two isotopes(actually Carbon has 5 isotopes, but for understanding we consider two isotopes here) i.e. C-12 and C-14

Here C-12 isotopes is non-radioactive but C-14 is considered as radioactive

Radioactive substance have one property which we called decaying of matter

As the time passes radioactive matter or u can any radioactive substance started disappearanced or reducing

But the rate of decay means in how much time they decay is constant so we defined something called as half life of substance

Half life of any substance is defined as a time required by a substance to become half or we can 50% of original amount

Let us assume u have some substance in your hand having mass 100 gm and u observe that substance become 50 gm after 10 hr

Here, 10 hr is half life of substance

Similarly C-14 isotopes half life is 12.33 yrs

Now come to topic of fossil

In every organisms there are some amount of carbon present in it as we know that carbon is important part of carbohydrates, sugar, some protein also.

So let me again u one example

If a substance 'X' have half life of 1 day

and u pick up one substance and observe that Substance'X' is now present in 25% in that substance

and i have tell u that 1 day is half life of substance

so if initially X was 100% then after one half life it is 50% and again after 1 half life X was 25%

It means the substance u picked up generally 2 days old

same happens to fossil we check the amount of carbon or phosphorus (phosphorus dating) and compare it to the original amount of carbon or phosphorus present in that organism which is now became fossil and then calculate it's half life and then we understand that this fossil is some x years old

Answer 2

Answer:

The preserved remains of animals or plants or other organisms from the distant past are called fossils. These fossils tell us about many extinct animals and also give insights into how the evolution could have taken place.

Fossils are remains of animals or plants which were living in the geological past, they are found embedded or in petrified forms between old rocks during digging or any archaeological procedure. The study of fossils is called Paleontology.

Fossils' age can calculated by carbon dating and studying fossils will tell us about how old those fossils were and at what time they existed. Fossils give us information about the difference and similarities between the species present in the past and now and how the changes in them occurred leading to evolution. They also tell us about the extinct species and help in finding out the reasons for their extinction.

Explanation:

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