Louis Pasteur’s experiments, if yo | Class 12 Biology Chapter Evolution, Evolution NCERT Solutions

Current NCERT chapter

Academic session 2026-27, Chapter 6 in the current curriculum.

Welcome to the NCERT Solutions for Class 12 Biology - Chapter Evolution. This page offers a step-by-step solution to the specific question from Exercise 0, Question 1:

Louis Pasteur’s experiments, if you recall, proved that life can arise from only pre-existing life. Can we correct this as life evolves from pre-existent life or otherwise we will never answer the question as to how the first forms of life arose? Comment.

. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 1:

Louis Pasteur’s experiments, if you recall, proved that life can arise from only pre-existing life. Can we correct this as life evolves from pre-existent life or otherwise we will never answer the question as to how the first forms of life arose? Comment.

Answer:

Louis Pasteur, a French chemist, disapproved the theory of spontaneous generation by performing the experiment with two flasks. Louis Pasteur states that living things comes only from other living things. For example: mice come only from mice, bacteria from bacteria. We can correct the statement of Louis Pasteur by defining the chemical evolution towards the life that was described by Oparin and Haldane. A.I. Oparin and J.B.S. Haldane model suggested that under the strong reducing conditions have been present in the atmosphere of the early earth. They stated that organic molecules are formed spontaneously from the inorganic molecules.   


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.

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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 1: Louis Pasteur’s experiments, if you recall, proved that life can arise from only pre-existing ....

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