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Question
Observe the following figure and explain the concept.
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Solution
- The figure depicts the concept proposed by 'Lamarck'. Lamarck proposed that the activities of organisms are responsible for their evolution.
- This French naturalist proposed that each animal or plant undergo some changes in its life span and those changes are transferred to the next generation and such changes occur in the next subsequent generations too.
- The giraffe's neck has grown too long as a result of 'acquired characters'. For several generations, they have been browsing on the leaves of tall plants by extending their neck.
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RELATED QUESTIONS
Write short notes based upon the information known to you.
Lamarckism
a) Explain in brief - Lamarck’s principle of ‘use or disuse of organs’.
b) Give two examples.
c) What are ‘acquired characters’?
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Mention the two principles through which Lamarck explained his ideas.
Briefly discuss Lamarckian Theory of Inheritance citing an appropriate example.
Given alongside are two figures (A and B) showing a phenomenon that was first observed in Manchester before and after the year 1850.
Answer the following:
Give the common name and the scientific name of the insect involved in this phenomenon.
Theory of evolution : Darwin : : ____________ : Lamarck
What is inheritance of acquired characters?
Explain Lamarck’s Principle.
Observe the picture and answer the following questions.
- The given picture indicates which principle?
- Explain that principle in your language.
- What is the meaning of acquired characteristics?
The ‘use and disuse theory’ was proposed by ______.
The characters developed by the animals during their life time, in response to the environmental changes are called ______.
The use and disuse theory of organs’ was postulated by Charles Darwin.
The degenerated wing of a kiwi is an acquired character. Why is it an acquired character?
Observe the figure given below and answer the questions that follow:
- What is the figure depicting?
- What was the reason that the giraffe stretched their neck and forelimbs?
- What is the name of the theory that is being depicted in the figure?
- Who explained the theory?
- What is the conclusion of this theory?
