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Given : 1 = Natural selection , 2 = Vari...

Given : 1 = Natural selection , 2 = Variations and their inheritance , 3 = Survival of the fittest , 4 = struggle for existence
According the Darwinism, which of the following represents the correct squence of events in the origin of new species ?

A

1, 2, 3, 4,

B

2, 3, 1, 4

C

3, 4, 2, 1

D

4, 2, 3,1

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Assertion (A): Natural selection is the phenomenon by which the nature selects those species which possess survival advantage over the other species. Reason (R): According to theory of natural selection, there is struggle of existence within the species of a population for the environmental resources and their struggle leads to survival of certain organisms and elimination of the less competent species. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is NOT the correct explanation of A. c) A is true but R is false. d) A is false and R is true.

In what sequence, should these evolutionary events be placed to support Darwins' theory of evolution by natural selection? I. Inherited variations, which are favoured in a particular environment are passed on. II. There is a struggle for existence. III. In time, favoured inherited variations may accumulate causing gradual changes in the species. IV Populations tend to overproduce, but they remain more or less constant in number from generation to generation

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In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. _______________ the course of the development of different life-forms heredity—which, in plain English, is unconscious memory generated in the first life-form and ______________ through all the different species—is the sole factor in the ____________ of the parent properties, while adaptation to surrounding conditions and circumstances, natural selection in the struggle _____________ existence, and partner selection in the struggle of the males for ____________ are the principal factors in the differentiation of species. sole factor in the ____________ of the parent properties

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ARIHANT NEET-THEORIES OF EVOLUTION-Chapter exercise A (Taking it together (Assorted Questions of the chapter for advanced Level Practice))
  1. Which of the following is not true about mutation theory of Hugo de Vr...

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  2. Which of the following statements about Lamarck is true ?

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  3. Given : 1 = Natural selection , 2 = Variations and their inheritance ,...

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  4. Today, again the faith in Lamarck's theory has been revived by some pe...

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  5. Natural Selection Theory of Darwin is objected to, because it

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  6. Which of the following evidence proved that Lamarck's theory of evolut...

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  7. The primary mission of the voyage of HMS Beagle (1831-1836) was to

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  8. If Darwin's theory of pangenesis shows similarity with theory of inher...

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  9. Which one of the following phenomena supports Darwin's concept of natu...

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  10. Which one of the following sequence was proposed by Darwin and Wallace...

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  11. Darwin proposed that new species evolve from ancestral forms by the :

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  12. The best description of natural selection is :

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  13. Darwin believed that the certain parts of the body get larger and beco...

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  14. Darwin believed that the giraffe has the long neck because

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  15. Darwin in his 'Natural Selection Theory' did not believe in any role o...

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  16. Darwin in his "Natural Selection Theory" did not believe in any role o...

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  17. In a famous experiment, A Weismann cutt off tails of newborn mice gene...

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  18. Which of the following pairs are not correctly matched?

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  19. The idea of Natural Selection as the fundamental process of evolutiona...

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  20. Which of the following examples supports the Lamarckism?

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