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प्रश्न
With the help of suitable examples, explain why certain traits cannot be passed on to the next generation. What are such traits called?
उत्तर
Such traits are called acquired traits. Acquired traits are experienced by an individual during his lifetime. These traits involve changes in non reproductive cells (somatic cells) which are not transferred to germ cells. So, these traits cannot be passed on to the next generation.
For example:- Learning skills like swimming, dancing, cooking, body building, etc are acquired traits and can not be passed on to the next generation.
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संबंधित प्रश्न
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.
Why are traits acquired during the life-time of an individual not inherited?
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.
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 |
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"Only variations that confer an advantage to an individual organism will survive in a population". Do you agree with this statement? Give reason for your answer.
A population of red beetles lives in green bushes in a garden. Once during the process of breeding, a green beetle is produced.
(a) State whether the change in colour of beetle is a process of evolution or not.
(b) Can the new colour of green beetle be passed on to its next generations?
(c) What will be the advantage (if any) of the green colour to the beetle?
(d) State whether the production of green colour involved a change in genetic material or not.
Complete the statement by choosing correct options from below .
Evolution means -- -- -- --.
Which of the following is the correct pair?
