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प्रश्न
Define organic evolution.
What is meant by organic evolution?
उत्तर
Organic evolution is a slow, gradual, continuous and irreversible change through which the present-day complex forms have descended from their simple pre-existing forms of the past.
संबंधित प्रश्न
Multiple choice question.
The sequence of origin of life may be-
Multiple choice question.
______ can be considered as a connecting link between ape and man.
The forelimbs of bat and human are examples of ______ organs.
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.
According to Oparin, which one of the following gases was not present in the primitive atmosphere of the earth?
Which was ale sent in the atmosphere at the time of origin of life?
Miller performed experiment to prove abiogenetic molecular evolution of life. Which molecule was not present in Miller's experiment?
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 |
Explain how did the experiment conducted by S.L. Miller substantiate that life evolved from preexisting nonliving organic molecules.
