How do we compute the age of a fossil? | Class 12 Biology Chapter Evolution, Evolution NCERT Solutions

Question:

How do we compute the age of a fossil?

Answer:

There are various methods for the determination of age of fossils and these are following:

Relative dating method: relative dating of the rocks was carried out by estimating the position and the rate of erosion in particular environment. Older rocks, being deeper had older or ancient fossils; and superficial rocks had more recent fossils. It does not tell any specific dates, only estimates whether the object is younger or older that are found at the site.
Absolute dating method: this method determines how much time have passed since the rock formation occurred by measuring the radioactive decay; or based on the property of spontaneous decay of unstable radioactive nuclei into stable form at the constant rate. This involves three techniques: Uranium- Lead Technique, Carbon (C¹⁴) Dating Technique and Potassium- Argon Technique.

1
0
0
Report?

Report a problem on Specifications:

Email id:

Comments

Next Question >

Popular questions of class 12 Biology

Q: What is spermatogenesis? Briefly describe the process of spermatogenesis.

Q: Why is reproduction essential for organisms? Answer

Q: Write a short note on
(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals.

Q: With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.

Q: What is DNA fingerprinting? Mention its application.

Q: Describe the structure of a seminiferous tubule.

Q: What is oogenesis? Give a brief account of oogenesis.

Q: What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

Q: With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.

Q: Explain the Law of Dominance using a monohybrid cross.

Recently Viewed Questions of Class 12 Biology

Both a wine maker and a molecular biologist who had developed a recombinant vaccine claim to be biotechnologists. Who in your opinion is correct?

Q: Explain why meiosis and gametogenesis are always interlinked?

Q: What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

Define a cistron. Giving examples differentiate between monocistronic and polyeistronic transcription unit.

Q: With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.

Human activities interfere with carbon cycle. List any two such activities.

Q: Identify True/False statements. Correct each false statement to make it true.
(a) Androgens are produced by Sertoli cells. (True/False)
(b) Spermatozoa get nutrition from Sertoli cells. (True/False)
(c) Leydig cells are found in ovary. (True/False)
(d) Leydig cells synthesise androgens. (True/False)
(e) Oogenesis takes place in corpus luteum. (True/False)
(f) Menstrual cycle ceases during pregnancy. (True/False)
(g) Presence or absence of hymen is not a reliable indicator of virginity or sexual experience. (True/False)

Q: Define ecological pyramids and describe with examples, pyramids of number and biomass.

Q: Why is the offspring formed by asexual reproduction referred to as clone?

What for Nucleopolyhydro viruses are being used now a days?

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Evolution.
Review previous year question papers to get an idea of how such questions may be framed in exams.
Practice answering questions within the time limit to improve your speed and accuracy.
Discuss your answers with your teachers or peers to get feedback and improve your understanding.

Comments

Comment(s) on this Question

Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 6: How do we compute the age of a fossil?....

How do we compute the age of a fossil? | Class 12 Biology Chapter Evolution, Evolution NCERT Solutions

< Previous Question

Next Question >

Popular questions of class 12 Biology

Recently Viewed Questions of Class 12 Biology

Study Tips for Answering NCERT Questions:

Comments

Comment(s) on this Question

Chapters for Class 12 Biology

Subjects for Class 12

Students Also Read

Important links

Quick Links

Resources

Support