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प्रश्न
What is meant by speciation?
What is speciation?
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उत्तर
The formation of a new species by evolution or any genetic modification of the previously existing species in a population is called speciation.
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संबंधित प्रश्न
Explain the following:- Speciation
Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Why or why not?
Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Why or why not?
Only variations that confer an advantage to an individual organism will survive in a population. Do you agree with this statement? Why or why not?
Name two human traits which show variation.
A plant with two 'small' genes breeds with a plant with two 'tall' genes to produce :
(a) small plants and tall plants in the ratio 1 : 3
(b) all small plants
(c) all tall plants
(d) tall plants and small plants in the ratio 3 : 1
A plant has two varieties, one with red petals and the other with white petals. When these two varieties are cross-pollinated, all the offsprings have red petals?
(a) Which gene is dominant?
(b) Choose suitable letters to represent the two genes.
Name the scientist who gave the theory of evolution.
Fill in the following blank with suitable word:
Broccoli has evolved from .............. by the process of artificial selection.
Give an example of characteristics being used to determine how close two species are in evolutionary terms.
Give two examples of plant species and two of animals.
State the various factors which could lead to the formation of new species.
How are those species which are now 'extinct' studied?
Define 'speciation'. Explain how speciation occurs.
According to the evolutionary theory, the formation of a new species is generally due to ______
List any two factors that could lead to speciation.
State and define three factors responsible for the rise of a new species.
In human males, all the chromosomes are paired perfectly except one. These unpaired chromosomes are ______
(i) Large chromosome
(ii) Small chromosome
(iii) Y chromosome
(iv) X chromosome
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 |
