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प्रश्न
List out the major gases that seem to be found in the primitive earth.
उत्तर
CO2, NH3, UV, and Water vapour.
संबंधित प्रश्न
Define organic evolution.
State the theory of Biogenesis. How does Miller’s experiment support this theory?
Multiple choice question.
Who proposed that the first form of life could have come from per- existing nonliving organic molecules?
Multiple choice question.
Archaeopteryx is known as missing link because it is a fossil and share characters of both
Multiple choice question.
Which of the following characteristic is not shown by the ape?
Multiple choice question.
______ can be considered as a connecting link between ape and man.
The homologous organs look similar and perform similar functions but they have different origin and developmental pattern.
Higher Order Thinking Skill (HOT)
Arun was playing in the garden. Suddenly he saw a dragon fly sitting on a plant. He observed the wings of it. He thought it looked similar to a wing of a crow. Is he correct? Give reason for your answer.
Evolution was termed RNA world due to the discovery of:
Atmosphere of earth just before the origin of life consisted of:
Which pigment acts directly to convert light energy to chemical energy?
Which was ale sent in the atmosphere at the time of origin of life?
The Big Bang theory states that the formation of the universe began approximately ______ years ago.
Match the scientists listed under column ‘I’ with ideas listed column ‘II.
| Column I | Column II |
| A. Darwin | i. abiogenesis |
| B. Oparin | ii. use and disuse of organs |
| C. Lamarck | iii.continental drift theory |
| D. Wagner | iv. evolution by natural selection |
In 1953 S. L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from pre-existing non-living organic molecules. The primitive earth conditions created include ______.
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.
Why is nascent oxygen supported to be toxic to aerobic life forms?
According to one of the most widely accepted theories, earth's atmosphere before origin of life consists of a mixture of ______.
Explain how did the experiment conducted by S.L. Miller substantiate that life evolved from preexisting nonliving organic molecules.
