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प्रश्न
List any three drawbacks of Darwinism.
Mention any four drawbacks of Darwinism.
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उत्तर
The following are the drawbacks of Darwinism:
- Darwin could not explain the origin of variations or how they arise. He failed to distinguish between environmental and hereditary variations.
- Darwin did not differentiate between somatic and germinal variations. He mistakenly considered all variations as heritable.
- Darwin’s theory lacked clarity on how new characters arose or how the “arrival of the fittest” occurred. He didn’t explain how advantageous traits were inherited.
- Darwin believed in gradual evolution, but he didn’t recognize intermediate forms. He also couldn’t explain species extinction or vestigial organs.
- Darwin couldn’t explain neutral traits or hybrid sterility. He also overlooked the hindrance caused by over-specialized organs like tusks and antlers.
Notes
Students should refer to the answer according to their question and preferred marks.
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संबंधित प्रश्न
Explain Darwinian theory of evolution with the help of one suitable example.
Name and define the three types of natural selection.
Briefly discuss the Theory of Natural Selection as given by Darwin.
Given below are two figures (A and B) showing a phenomenon that was first observed in Manchester before and after the year 1850.
Answer the following:
- What name has been given to this phenomenon?
- Give the common name and the scientific name of the insect involved in this phenomenon.
- Briefly mention why the changes shown in the two figures appeared.
- The following phenomenon provides a classical explanation of a scientific theory given by a certain scientist.
- Name and explain the said theory.
- Give the name of the scientist who gave this theory.
Explain the evolution of the long neck of giraffe according to Charles Darwin.
In which book Darwin had published his theory of Natural selection?
Identify the two organisms which are now extinct and are studied from their fossils.
Differences between organisms in a species are described as variations. Which of the following would you describe as a continuous variation?
Theory of natural selection dwells on:
Write drawbacks of Darwin's theory
Distinguish between directional, stabilizing and disruptive selection.
Charles Darwin explained the origin of species through ______.
Which one of the following was not explained by Darwinism?
The famous book "The Origin of Species" was written by ______.
Define the following term:
Speciation
DDT resistant mosquitoes and different break sizes of African seed cracker finches show ______ type of selection respectively.
