Struggle for existence and survival of the fittest are the two principles of natural selection theory . Is it correct ?
Answers
*Organisms produce offspring with different traits, which can be inherited
Refer : http://www.apsmuseum.org/dialogues-with-darwin-exhibition/darwins-big-idea-natural-selection/
Question :-
Struggle for existence and survival of the fittest are the two principles of natural selection theory . Is it correct ?
Answer :
Yes they are the two principles of the natural selection theory .
Details
➡According to the theories of Darwin , individuals multiply in geometric progression.
Example : 2 , 4 , 8 , 10 .....
➡However food multiplies in arithmetic progression .
Example : 2 , 4 , 6 , 8 ........
➡ Space for accommodation of organisms is constant and does not increase .
➡This leads to intense struggle between living organisms for food , shelter, climate , breeding places , food supply and mate .
➡ Intense competition arises and the competition is of different levels such as :
(i) interspecific ( different species ) and
(ii) intraspecific ( same species ) .
➡During this process of struggle for existence , only the strongest individuals who are fit for the environment survive.
➡The ones who are strong is only selected by nature and the rest die . This is called Natural Selection.
➡The process of struggle for existence while facing competitions within or between other species is called Struggle for existence .
Explanation with example :
➡Oysters lay 60 to 80 million eggs every spawn . If all would have survived, then the oysters would have filled up the entire Earth.
➡Same with bacteria and paramecium .
➡Elephants who are the slowest breeder breeds once in 15 years average.
If all survived , the there would have been trillions of elephants up to date.
Thus natural selection and struggle for existence leads to variation and evolution of mankind !
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