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Assertion: Continued use of eyes leads t...

Assertion: Continued use of eyes leads to an improvement of eyesight.
Reason: Isolating mechanisms prevent reproduction even between the members of same species.

A

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion

B

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C

If Assertion is true but the Reason is false.

D

If both Assertion and Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
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Assertion : Sympatric species are geographically isolated. Reason : Sympatric species are reproductively isolated.

Assertion: Biological concept of species is based on reproductive isolation. Reason: Biological concept of species is universal.

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These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following five reponses (a) If both Assertion and Reason arecorrect and Reason is the correct explanation of Asserrtion. (b) If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion. (c ) If Assertion is true but Reason is false. (d) If Assertion is false but Reason is true. Assertion A block of mass m starts moving on a rough horizontal surface with a velocity v. It stops due to friction between the block and the surface after moving through a certain distance. The surface is now tilted to an angle of 30^(@) with the horizontal and the same block is made to go up on the surface with the same initial velocity v. The decrease in the mechanical energy in the second situation is smaller than that in the first situation. Reason The coefficient of friction between the block and the surface decreases with the increase in the anglle of inclination.

Assertion: The pattern and position of fringes always remain same even after the introduction of transparent medium in a path of one of the slit. Reason: The central fringe is bright or dark is depend upon the initial phase difference between the two coherence sources.

Assertion: Competition always occurs between closely related species complete for same resources that are limiting. Reason:- Totally unrelated species could not complete for same resources.

ICSE-EVOLUTION-COMPETITION CORNER (Assertion and Reason Type Questions (For AIIMS aspirants))
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  2. Assertion: Primary atmosphere of primitive earth was reducing Reason: ...

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  3. Assertion: The mechanism of origin and evolution can be suggested. R...

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  4. Assertion: Life originated in water. Reason: Primitive waterbodies w...

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  5. Assertion: Mutations are basically different from fluctuations. Reas...

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  6. Assertion: Best adapted and less adapted individuals reproduce at th...

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  7. Assertion: Lederberg's experiment explains the genetic basis of adapta...

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  8. Assertion: Ostrich has vestigial wings and feather but is a cursorial ...

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  9. Assertion: All the animals have three germ layers in their development...

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  10. Assertion: Frog has a fish-like tadpole larva in its life history Re...

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  11. Assertion: All the living organisms have certain basic similarities. ...

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  12. Assertion: Forelimbs of different vertebrates are basically similar. ...

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  13. Assertion: Dinosaurs were connecting links between reptiles and birds....

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  14. Assertion: Many physical and chemical agents induce inheritable mutati...

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  15. Assertion: There is an everlasting competition between individuals hav...

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  16. Assertion: Evolution is adaptation through generations. Reason: Only...

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  17. Assertion: Natural selection is not the exclusive force of speciation....

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  18. Assertion: Human evolution occurred in Asia and Africa. Reason: The ...

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  19. Assertion: Among the primates, chimpanzee is the closest relative of m...

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  20. Assertion: Natural selection is the outcome of differences in survival...

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