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प्रश्न
List out the major gases that seem to be found in the primitive earth.
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उत्तर
CO2, NH3, UV, and Water vapour.
संबंधित प्रश्न
Define organic evolution.
Describe the experiment that helped Louis Pasteur to dismiss the theory of spontaneous generation of life.
Rearrange the human activities mentioned below as per the order in which they developed after the modern Homo sapiens came into existence during ice age:
- Human settlement
- Prehistoric cave art
- Agriculture
Describe the Miller and Urey experiment on the origin of life
What is the difference between the teeth of apes and the teeth of man?
Answer the following question.
State the two principal outcomes of the experiments conducted by Louis Pasteur on the origin of life.
Answer the following question.
State two postulates of Oparin and Haldane with reference to the origin of life.
Multiple choice question.
Who proposed that the first form of life could have come from per- existing nonliving organic molecules?
Multiple choice question.
The sequence of origin of life may be-
Multiple choice question.
Select the analogous organs.
Multiple choice question.
Archaeopteryx is known as missing link because it is a fossil and share characters of both
Multiple choice question.
______ can be considered as a connecting link between ape and man.
The forelimbs of bat and human are examples of ______ organs.
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.
The Big Bang theory states that the formation of the universe began approximately ______ years ago.
Oparin's theory is based on
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 |
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 ______.
