By studying the ratio of different isotopes of same element in a material we can know the age ofa)Living animalsb)Fossilc)Both (a) and (b)d)Living plantsCorrect answer is option 'B'. Can you explain this answer?

Question

By studying the ratio of different isotopes of same element in a material we can know the age of&#8203;a)Living animalsb)Fossilc)Both (a) and (b)d)Living plantsCorrect answer is option 'B'. Can you explain this answer?

Answer

There are two ways by which we can determine the age of fossils-

(1) If we dig into the earth and start finding fossils, it is reasonable to suppose that the fossils we find closer to the surface are more recent than the fossils we find in deeper layers.

(2) By detecting the ratios of different isotopes of the same element in the fossil material.This method is known as carbon dating.

Carbon dating is a method to estimate the age of carbon containing materials like trees. Carbon (C) has three naturally occurring isotopes. Both C-12 and C-13 are stable, but C-14 decay to nitrogen-14 with a half-life of approximately 5,730 years. Animals and plants naturally incorporate both the C-12 and C-14 during their lifetimes. When a creature dies, it ceases to consume more radiocarbon while the C-14 already in its body continues to decay back into nitrogen. With the help of C-12 to C-14 ratio, we can estimate the age of dead plants/ animals.

Answer

Ya as according to ncert by studying the ration of different isotopes of same element in a material we can know the age of fossils.

Answer

But I think that we can also use this method for living beings.

Answer

Isotopes and Age Determination:
Isotopes are variants of the same element that have the same number of protons but different numbers of neutrons. These isotopes can be used to determine the age of certain materials through a process called radiometric dating.

Radiometric Dating:
Radiometric dating is a technique used to determine the age of rocks, fossils, and other materials based on the ratio of isotopes present. It relies on the principle that some isotopes decay at a known rate over time, which allows scientists to calculate the age of a material by measuring the ratio of parent isotopes to daughter isotopes.

Different Isotopes and Age Determination:
The ratio of different isotopes of the same element can be used to determine the age of fossils. Fossils are the preserved remains or traces of organisms that lived in the past. By analyzing the isotopic composition of the fossil material, scientists can estimate its age.

Living Animals:
The ratio of isotopes in living animals can also provide information about their age. However, this method is not as commonly used for living animals as it is for fossils. In living animals, isotopic analysis is more often used to study their diet, migration patterns, and other ecological factors.

Living Plants:
The age of living plants can also be determined by studying the ratio of isotopes. Isotopic analysis of plant materials can provide information about their growth rate, environmental conditions, and other factors that can help estimate their age.

Conclusion:
In conclusion, studying the ratio of different isotopes of the same element can provide valuable information about the age of fossils. While isotopic analysis can also be used for living animals and plants, it is primarily used for determining the age of fossils. Therefore, the correct answer is option B - Fossil.

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