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प्रश्न
Why are the small numbers of surviving tigers a cause of worry from the point of view of genetics?
उत्तर १
The small number of members in a population of tigers do not allow large number of variation to occur which are essential to survival of the species. A deadly disease or calamity may cause death of all the tigers. The small number of tiger also indicates that existing tiger variants are not well adopted to the existing environment and may extinct soon.
उत्तर २
The small numbers of surviving tigers is a cause for worry from the point of view of genetics, because if all tigers perish and become extinct, their genes will be lost forever.
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संबंधित प्रश्न
Write the contribution of Charles Darwin in the field of 'evolution.'
Fill in the following blank with suitable word :
The human forelimb and bat's forelimb are an example of .......... organs whereas an insect's wing and a bat's wing are an example of ........... organs.
In what way are analogous organs evidence for evolution?
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.
Draw a graph to show that natural selection leads to disruptive change.
Name any three types of premating isolating mechanisms.
Explain stabilizing, directional and disruptive selection with examples.
The Sewall Wright effect is also referred to as ______
Variations during mutations of meiotic recombinations are ______.
