Biology
Grade-9
Easy
Question
Lamarck’s theory of evolution fails to explain how:
- Indian women despite of getting their ear pierced for thousands of years cannot birth a single baby with pierced ear.
- Giraffes have long legs as they have to eat leaves from the tall trees in their habitat.
- Deer’s can escape from Enemies because these can run very fast.
- High altitude Pines have branches with slope down so snow fails to collect up on them in winter
Hint:
Lamarckism, a theory of evolution based on the principle that physical changes in organisms during their lifetime—such as greater development of an organ or a part through increased use—could be transmitted to their offspring.
The correct answer is: Indian women despite of getting their ear pierced for thousands of years cannot birth a single baby with pierced ear.
- Indian women have getting their ears pierced for thousands of years, but this character does not pass to any offspring, this casts doubt on Lamarck's theory of evolution.
- Later on, in Neo-Lamarckism, it was explained that only those characters will be inherited which can affect germ cells, while characters that affect somatic cells do not pass to descendants.
- Thus, the correct answer is 'Indian women have been getting their ears pierced for thousands of years, but not a single baby with pierced ears is born.
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