Advertisements
Advertisements
Questions
List any three drawbacks of Darwinism.
Mention any four drawbacks of Darwinism.
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
Name the scientist who influenced Darwin and how ?
All organisms produce more young ones. Comment
Answer each question in ‘One’ sentence only:
Identify which one of the following is a test cross.
Give the scientific name of the organism which is cited as the classical example of "natural selection".
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:
- 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.
What are objections raised against Darwin's theory?
Identify the two organisms which are now extinct and are studied from their fossils.
Select the correct statement.
What are homologous structures? Give an example. Is it necessary that homologous structures always have a common ancestor?
The ship on which Darwin was appointed as Naturalist was:
According to Darwin, two different areas within a continent have different species because they have different:
Origin of species was written by:
Mention Darwin's observations made on finches during his visit of Galapagos Islands. Write the explanation given by Darwin on his observations.
Industrial melanism was observed in ______.
Which one of the following was not explained by Darwinism?
Industrial melanism was highlighted by ______.
The famous book "The Origin of Species" was written by ______.
Differentiate between Lamarck's Theory and Darwin's Theory.
Match the name of the scientist in Column I with the name of the theory in Column II.
| Column (I) | Column (II) | ||
|---|---|---|---|
| i. | August Weisman | a. | Theory of origin of species |
| ii. | Hugo de Vries | b. | Theory of chemical evolution |
| iii. | Charles Darwin | c. | Theory of continuity of germplasm |
| iv. | Oparin Haldane | d. | Mutation theory |
Choose the correct option.
