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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
Give an example of characteristics being used to determine how close two species are in evolutionary terms.
A black mouse mates with a brown mouse, and all the offsprings are black.
(a) Why are no brown offsprings produced?
(b) If two of the black offsprings mate with each other what kind of offspring would you expect and in what proportions? Give reason for your answer.
Out of the wing of a bird, wing of an insect and the wing of a bat :
which two are homologous organs?
Read the following statement and justify the same in your own words with the help of a suitable example.
Study of fossils is an important aspect of study of evolution.
Short answer question.
What is disruptive selection?
Name any three types of premating isolating mechanisms.
Explain stabilizing, directional and disruptive selection with examples.
____________ 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?
