Biology
Grade-9
Easy
Question
Lamarckism cannot explain_____________.
- Weak muscles in a wrestler’s son
- Webbed feet of aquatic birds
- Evolution of horses
- Long neck of giraffe
Hint:
The Lamarckian theory cannot explain the reason for weak muscles in the son of a wrestler.
The correct answer is: Weak muscles in a wrestler’s son
- The Lamarckian theory is also known as the theory of inheritance of acquired characters or the theory of use and disuse of organs. This theory cannot explain the reason for weak muscles in the son of a wrestler.
- Lamarck in his use and disuse theory proposed that any body part used vigorously caused it to become stronger and inherited in descendants.
- Lamarckism failed to explain the reason behind the weak muscles of the wrestler’s son. Which was later on explained by August Weismann in his germ plasm theory.
- The germplasm theory claimed that only those changes would be inherited that affect germplasm (now called DNA) and any change in the body would not affect germplasm, so could not be inherited.
Related Questions to study
Biology
Match the following:
| a. aquatic birds | 1. Disuse of organs |
| b. flightless birds | 2. Limbed ancestors |
| c. Snakes | 3. Webbed feet |
Match the following:
| a. aquatic birds | 1. Disuse of organs |
| b. flightless birds | 2. Limbed ancestors |
| c. Snakes | 3. Webbed feet |
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Philosophie zoologique was written by__________.
Philosophie zoologique was written by__________.
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Match the following:
| a. Survival of the fittest | 1. Weismann |
| b. Theory of germplasm | 2. Lamarck |
| c. Inheritance of acquired characters | 3. Darwin |
Match the following:
| a. Survival of the fittest | 1. Weismann |
| b. Theory of germplasm | 2. Lamarck |
| c. Inheritance of acquired characters | 3. Darwin |
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Which of the following is an acquired trait?
Which of the following is an acquired trait?
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Lamarck’s theory of evolution fails to explain how:
Lamarck’s theory of evolution fails to explain how:
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Variations produced in ___________are not inherited, while variations produced in _______________ are inherited to the next generation?
Variations produced in ___________are not inherited, while variations produced in _______________ are inherited to the next generation?
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Somatic variations are inherited.
Somatic variations are inherited.
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Lamarck’s theory of evolution is called:
Lamarck’s theory of evolution is called:
BiologyGrade-9
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Which example explains Lamarckism?
Which example explains Lamarckism?
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The present-day snakes evolved from ancestors that had limbs. This example explains which postulate of Lamarck’s theory?
The present-day snakes evolved from ancestors that had limbs. This example explains which postulate of Lamarck’s theory?
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Weismann’s experiment discredited the hypothesis of:
Weismann’s experiment discredited the hypothesis of:
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What of the following is NOT a postulate of Lamarck’s theory of evolution?
What of the following is NOT a postulate of Lamarck’s theory of evolution?
BiologyGrade-9
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Lamarck’s theory states that, for organic evolution to occur each progeny:
Lamarck’s theory states that, for organic evolution to occur each progeny:
BiologyGrade-9
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Which of the following is NOT an acquired character?
Which of the following is NOT an acquired character?
BiologyGrade-9
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Lamarck’s theory is also known as:
Lamarck’s theory is also known as:
BiologyGrade-9
