The concept of chemical evolution is based on
- interaction of water, air and clay under intense heat
- effect of solar radiation on chemicals
- possible origin of life by combination of chemicals under suitable environmental conditions
- crystallization of chemicals
The Correct Option is C
Solution and Explanation
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Questions Asked in AIIMS exam
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
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Assertion: Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth.
Reason: Orbital velocity of a satellite is greater than its escape velocity.
In the light of the above statements, choose the correct answer from the options given below- AIIMS - 2019
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Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
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- Transcription
Concepts Used:
Mechanisms of Evolution
The mechanism of evolution has been explained with theories such as the Big Bang Theory, the Theory of Darwin, and the Hardy-Weinberg Equilibrium where evolution is the process of natural selection that causes changes in the traits of species over multiple generations.
The Big Bang Theory:
The most widely accepted theory for the origin of life on Earth and its various forms is the Big Bang Theory. According to the hypothesis, as a result of a massive explosion, the universe was created 20 billion years ago.
Hardy-Weinberg Equilibrium:
According to the idea of Hardy-Weinberg, allelic frequency and gene pool remain stable throughout generations. Furthermore, the allelic frequencies add up to 1.
Theory of Darwin:
The Theory of Darwin's natural selection hypothesis provided a more reasonable explanation for the emergence of new species. As a result of adaptation to changing environmental conditions, natural selection led to the evolution of multiple species from a single species.
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