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प्रश्न
Explain the concept ‘survival of the fittest’.
उत्तर
Survival of the fittest (Natural selection):
a. The organisms having favourable variations succeed in the struggle for existence.
b. The organisms with unfavourable variations are unfit to survive and they perish.
c. This means survival of the fittest.
d. Nature selects the organisms with favourable variations and these are fittest to survive, hence, the theory is known as Theory of Natural selection.
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संबंधित प्रश्न
What are the different ways in which individuals with a particular trait may increase in a population?
How are the areas of study – evolution and classification – interlinked?
Give the respective scientific terms used for studying the development of new type of organisms from the existing ones.
Explain how, characteristics (or traits) are inherited through genes.
In what way are homologous organs evidence for evolution?
Write short notes based upon the information known to you.
Evolution
Explain the following :
(a) Speciation
(b) Natural Selection
Short answer question.
Give an example of disrruptive selection
Transfer of a part of chromosome or set of genes to a non-homologous chromosome is called ________.
Name any three types of premating isolating mechanisms.
