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प्रश्न
Given alongside are two figures (A and B) showing a phenomenon that was first observed in Manchester before and after the year 1850.
Answer the following:
The following phenomenon provides a classical explanation of a scientific theory given by a certain scientist.
(i) Name and explain the said theory.
(ii) Give the name of the scientist who gave this theory.
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उत्तर
- Natural selection: During the struggle for existence, only individuals with advantageous variations survive, while those who lack these variations are wiped out. Nature selects only those variations which are suitable for existence. This process is called natural selection.
- Charles Darwin proposed the idea of natural selection.
संबंधित प्रश्न
Survival of fittest : Darwin : : Acquired characters : ..............................
Mention the two principles through which Lamarck explained his ideas.
Theory of evolution : Darwin : : ____________ : Lamarck
The use and disuse theory of organs’ was postulated by Charles Darwin.
Observe the following figure and explain the concept.
The theory proposed by Lamarck is ______.
Which environmental change did Lamarck cite as driving the evolution of the horse?
In the evolution of the horse, the shift from being flat-footed to running on hooves corresponds to which specific change?
How were webbed feet in swimming birds explained under Lamarck's evidences?
August Weismann dealt the greatest blow to Lamarckism through which theory?
