Gujarati
Hindi
6.Evolution
normal

What is the use of Electronic Spin Resonance $(ESR)$ in fossil studies?

A

It helps to study the proteins in sedimentary fossils

B

It helps to revise the evolutionary period for different groups of organisms

C

It helps to study the enzymes present in sedimentary fossils

D

All of the above

Solution

Electron Spin Resonance $(ESR)$ Dating Many materials found in archeological sites are able to trap electronic charges as a result of bombardment by radioactive radiation from the surrounding sediment.

The presence of these trapped charges can be detected by Electron Spin Resonance $(ESR)$ spectroscopy.

The intensity of the $ESR$ signal is a measure of the accumulated dose and thus of the age. Tooth enamel is ubiquitous at archeological sites and is well suited for $ESR$ dating, with a precision of about $10-20\, \%$.

This method has now been used to date many sites critical to the biological and cultural evolution on modern man

Standard 12
Biology

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