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प्रश्न
What is species and speciation?
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उत्तर
- Species is a group of organisms that can produce fertile individuals through natural reproduction.
- Speciation is the formation of new species of plants and animals as an effect of evolution.
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संबंधित प्रश्न
What factors could lead to the rise of a new species?
Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Why or why not?
List four factors responsible for speciation.
Which of the following represent tall plants and which represent short plants (or dwarf plants)?
(a) Tt
(b) tt
(c) TT
Give reason for your choice (The symbols have their usual meaning).
What do you understand by the term variation?
Name two human traits which show variation.
Name the scientist who gave the theory of evolution.
Name an animal having rudimentary eyes.
Define 'speciation'. Explain how speciation occurs.
Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Give reason for your answer.
New species may be formed if:
- DNA undergoes significant changes in germ cells
- chromosome number changes in the gamete
- there is no change in the genetic material
- mating does not take place
According to the evolutionary theory, the formation of a new species is generally due to ______
Define Speciation.
Define speciation according to A.E. Emerson.
In the following Question, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:
Assertion: Speciation is the reproductive isolation amongst once interbreeding population.
Reason: Genetic drift, Natural selection, and Severe DNA change can cause speciation.
The theory of evolution of species by natural selection was given by
Cichlid fishes in Lake Victoria are representatives of ______ type of speciation.
Complete the following chart:
| Animals | Connecting link between | |
| (1) | Balanoglossus | ______ |
| (2) | ______ | Annelida and Arthropoda |
| (3) | Lung fishes | ______ |
| (4) | ______ | Reptiles and mammals |
| (5) | Seymouria | ______ |
| (6) | Fishes and Amphibia |
