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प्रश्न
Objection to Darwin's theory of natural selection.
Write the objection raised against Darwin's theory of natural selection.
Write any two objections that were raised against Darwin's Theory of Natural Selection.
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उत्तर
- Natural selection is not the only factor responsible for evolution
- Darwin did not mention any explanation about useful and useless modifications
- There is no explanation about slow changes and abrupt changes.
Notes
Students should refer to the answer according to their questions.
संबंधित प्रश्न
Explain Darwinian theory of evolution with the help of one suitable example.
All organisms produce more young ones. Comment
The largest unit in which gene flow is possible is :
(1) Organism
(2) Population
(3) Species
(4) Genes
Answer each question in ‘One’ sentence only:
Identify which one of the following is a test cross.
Industrial melanism provides a good example of natural selection. Discuss.
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.
Answer the following question.
Explain ‘fitness of a species’’ as mentioned by Darwin.
The theory of natural selection for evolution was proposed by ______.
Differences between organisms in a species are described as variations. Which of the following would you describe as a continuous variation?
What is the ancient name for all human beings?
A basket of vegetables contains carrot, potato, radish and tomato.
Which of them represent the correct homologous structures?
Study the following cross and showing self pollination in F1, fill in the blank and answer the question that follows
| Parents | RRYY | × | rryy |
| Round, Yellow | wrinkled, green | ||
| F1- | Rr Yy | × | ? |
| Round, yellow |
According to Darwin, two different areas within a continent have different species because they have different:
Species occurring in the different geographical areas are called as ______.
What are the key concepts in the evolution theory of Darwin?
Who proposed the theory of survival of the fittest?
Nature has a way of causing organisms that inherit advantageous traits to survive and reproduce more successfully than the ones that do not. This process is known as ______.
Write drawbacks of Darwin's theory
Distinguish between directional, stabilizing and disruptive selection.
Industrial melanism was observed in ______.
The theory of natural selection (Darwinism) was proposed by:
In which year did Darwin explain his theory (Darwinism) in his famous book, Origin of Species by Natural Selection?
During his voyage of data collection, Darwin travelled on the ship:
Who accompanied Darwin on his voyage aboard the HMS Beagle?
Darwin's views on organic evolution were heavily shaped by which work of Thomas R. Malthus?
