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प्रश्न
What is a connecting link?
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उत्तर
These are fossil forms transitional or intermediate between two groups of organisms. It shows some characters to both the groups. Thus, it indicates the evolutionary line Seymouria (between amphibians and reptiles). e.g., Archaeopteryx (between reptiles and birds).
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संबंधित प्रश्न
"We cannot pass on to our progeny the experiences and qualifications earned during our life time". Justify the statement giving reason and examples.
Why are the small numbers of surviving tigers a cause of worry from the point of view of genetics?
A gradual change, over a long period, in a form of life is known as :
(a) erosion
(b) evolution
(c) revolution
(d) evaluation
Read the following statement and justify same in your own words with the help of suitable example.
Human evolution began approximately 7 crore years ago.
Explain the following :
(a) Speciation
(b) Natural Selection
Short answer question.
Write a note on Genetic drift.
Short answer question.
Draw a graph to show that natural selection leads to disruptive change.
Transfer of a part of chromosome or set of genes to a non-homologous chromosome is called ________.
Evolution occurs as a result of mutations in ______.
The idea of mutation was brought forth by:
