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प्रश्न
Define Organic evolution.
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उत्तर
Organic evolution can be defined as slow, gradual, continuous and irreversible changes through which the present-day complex forms of the life developed (or evolved) from their simple pre-existing forms.
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संबंधित प्रश्न
Define evolution. How does it occur?
With the help of suitable examples, explain why certain traits cannot be passed on to the next generation. What are such traits called?
Write the contribution of Charles Darwin in the field of 'evolution.'
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
Out of the wing of a bird, wing of an insect and the wing of a bat :
which two are analogous organs?
Give one example each of characters that are inherited and the ones that are acquired in humans. Mention the difference between the inherited and the acquired characters.
Define the Gene pool.
Short answer question.
Write a note on Genetic drift.
Theory of inheritance of acquired character was given by:
