The age of fossils was traditionally determined by radio-carbon dating and other methods involving radioactive elements found in the rocks. More precise methods currently used for determining the evolutionary time of different groups of organisms include:

  • A
    Study of carbohydrates/proteins in fossils
  • B
    Study of the conditions under which fossils were formed
  • C
    Electron Spin Resonance $(ESR)$ and $DNA$ analysis of fossils
  • D
    Study of carbohydrates/proteins in rocks

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Similar Questions

The presence of gills in the tadpole of a frog indicates that . . . . . . .

In $1938$,a fish caught in .......... was thought to be extinct,but it was a Coelacanth.

Did aquatic life forms get fossilised? If yes,where do we come across such fossils?

$A$: Archaeopteryx had free caudal vertebrae and a toothed beak with teeth like reptiles.
$R$: It is a missing link between reptiles and birds.

Based on Haeckel's observations,during which stage are certain features common to all vertebrates?

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