Darwins Theory of Evolution
Darwins Theory of Evolution
Charles Darwin made a sea voyage around the world in a sailship HMS Beagle.
Based on his observations, he concluded the following
This fitness of the individual, according to Darwin, refers ultimately to the reproductive fitness. Such fit individuals leave more fit individuals than others. Thus, those organisms, which are better fit or adapt well will survive more in nature and will be selected by nature. This is called natural selection.
Natural Selection
It is based on following observations, which are factual
(i) Limited natural resources due to which populations are stable in size except for seasonal fluctuations.
(ii) Varying characteristics in members of a population, i.e., no two numbers of a population are identical even though they show similarities.
(iii) Variations are generally inherited and population size will, exponentially.
(iv) The population size is stable except seasonal fluctuations. It is due to the competition among the individual for resources
Those which are better adapted could survive and will reproduce at the cost of others, i.e., who are less adapted the environment.
Examples of natural selection are as follows
Industrial Melanism
Industrial melanism is an example of natural selection. There were collection of white moths in England. It was observed that before industrial revolution in England, white-winged moths were more in number than dark-winged moths. After industrialisation, dark-winged moths became more than white-winged moths.
This is because during industrialisation, the tree trunks covered by white lichens became dark due to air pollution (dust and soot particles). Due to this, white-winged moths could be easily eaten by the predators as they failed in camouflaging (hide or disguise the presence of a person, animal or object by means of camouflage).
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Chemical Resistance
It is another example of natural selection.
Students / Parents Reviews [20]
My experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
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Yogansh Nyasi
7thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
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Archit Segal
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Barkha Arora
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Aman Kumar Shrivastava
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Eshan Arora
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Manya
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Shivam Rana
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Prisha Gupta
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Aman Kumar Shrivastava
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
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Barkha Arora
10thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
