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प्रश्न
What are objections raised against Darwin's theory?
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उत्तर
Some of the main objections raised against Darwin’s theory of natural selection are as follows:
- Natural selection is not the only factor responsible for evolution.
- In his theory, Darwin did not explain the inheritance of useful and useless modifications.
- No explanation regarding slow and abrupt changes was provided in this theory.
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संबंधित प्रश्न
How do the observations made during moth collection in pre- and post- industrialized era in England support evolution by Natural Selection?
The largest unit in which gene flow is possible is :
(1) Organism
(2) Population
(3) Species
(4) Genes
Write short notes based upon the information known to you.
Darwin’s theory of natural selection
The theory of Natural Selection was proposed by
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.
Explain the evolution of the long neck of giraffe according to Charles Darwin.
The more characteristics two species have in common ______
Which concept was not included in Charles Darwin’s theory of Natural Selection?
Wild cabbage has evolved into new varieties like cabbage, broccoli, and cauliflower by ______
What are homologous structures? Give an example. Is it necessary that homologous structures always have a common ancestor?
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 |
Match List - I with List - II.
| List - I | List II | ||
| (a) | Adaptive radiation | (i) | Selection of resistant varieties due to excessive use of herbicides and pesticides |
| (b) | Convergent evolution | (ii) | Bones of forelimbs in Man and Whale |
| (c) | Divergent evolution | (iii) | Wings of Butterfly and Bird |
| (d) | Evolution by anthropo- genic action | (iv) | Darwin Finches |
Choose the correct answer from the options given below.
Who proposed the theory of survival of the fittest?
Mention Darwin's observations made on finches during his visit of Galapagos Islands. Write the explanation given by Darwin on his observations.
Charles Darwin explained the origin of species through ______.
Mention four main postulates of Darwin's theory.
Define the following term:
Speciation
