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प्रश्न
Complete the statement by choosing correct options from below .
Evolution means -- -- -- --.
पर्याय
Gene
Mutation
Translocation
Transcription
Gradual development
Appendix
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उत्तर
Evolution means gradual development.
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संबंधित प्रश्न
Explain the concept ‘survival of the fittest’.
According to de-Vries what is saltation?
List three distinguishing features, in tabular form, between acquired traits and the inherited traits.
Insects, octopus, planaria and vertebrates possess eyes. Can we group these animals together on the basis of eyes that they possess ? Justify your answer giving reason.
Some plants occur in one of the two sizes : tall or dwarf. This characteristic is controlled by one pair of genes. Tallness is dominant to dwarfness. Choose suitable letters for this gene pair.
Match the terms given in column I with those given in column II :
| Column I | Column II |
| (1) Fossil | (a) A famous evolutionist |
| (2) A theory of evolution | (b) Survival of the fittest |
| (3) Probable ancestor of birds | (c) Petrified remains of prehistoric life |
| (4) Charles Darwin | (d) Father of genetics |
| (5) Gregor Mendel | (e) Archaeopteryx |
Which of the following gas was not present in early earth atmosphere?
(a) Ammonia
(b) Oxygen
(c) Hydrogen sulphide
(d) Methane
A gradual change, over a long period, in a form of life is known as :
(a) erosion
(b) evolution
(c) revolution
(d) evaluation
Out of the wing of a bird, wing of an insect and the wing of a bat :
which two are analogous organs?
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.
Read the following statement and justify the same in your own words with the help of suitable examples.
Study of fossils is an important aspect of study of evolution.
List two differences between acquired traits and inherited traits by giving an example of each.
Multiple choice question.
Gene frequency in a population remain constant due to –
Short answer question.
Draw a graph to show that natural selection leads to disruptive change.
The first systematic explanation of the concept of evolution was given by ______.
____________ results in variation in gene frequencies within population by chance rather than by natural selection.
Theory of inheritance of acquired character was given by:
Which of the following is the correct pair?
Variations during mutations of meiotic recombinations are ______.
Which fossil animal is considered as the connecting link between reptiles and birds? Give any one character of each class found in it.
