Advertisements
Advertisements
Question
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?
Advertisements
Solution
- The figure shows how giraffe's necks evolved to graze on taller trees.
- Giraffes were ground-feeding animals, but the location lacked ground-level vegetation, so giraffes began grazing from trees. The constant stretching of the neck resulted in larger necks.
- Lamarck's Theory of Inheritance of Acquired Characters.
- Jean Baptiste De Lamarck.
- This idea suggests that changes in organisms might result from the underuse or overuse of organs. These mutations are passed down to the offspring, and over generations, these differences become permanent characteristics of the organism.
APPEARS IN
RELATED QUESTIONS
Mention the two principles through which Lamarck explained his ideas.
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:
Briefly mention why the changes shown in the two figures appeared.
The characters developed by the animals during their life time, in response to the environmental changes are called ______.
Observe the following figure and explain the concept.
The theory proposed by Lamarck is ______.
In which work and year was Lamarck's theory of evolution published?
According to the postulate on the 'Formation of New Organs', a new organ develops in response to which factor?
In the evolution of the horse, the shift from being flat-footed to running on hooves corresponds to which specific change?
How were webbed feet in swimming birds explained under Lamarck's evidences?
According to the scientific conclusion that rejected Lamarckism, modifications caused by the environment or the 'use and disuse' of organs only affect which cells?
