Home
Class 12
BIOLOGY
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
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • EVOLUTION

    ICSE|Exercise COMPETITION CORNER (OBJECTIVE TYPE QUESTIONS) (Multiple Choice Questions (MCQs))|55 Videos

  • ENVIRONMENTAL ISSUES

    ICSE|Exercise COMPETITION CORNER (ASSERTION AND REASON TYPE QUESTIONS (FOR AIIMS ASPIRANTS))|9 Videos

  • HUMAN HEALTH AND DISEASE

    ICSE|Exercise COMPETITION CORNER (OBJECTIVE TYPE QUESTIONS) (Assertion and Reason Type Questions (For AIIMS aspirants))|28 Videos

Similar Questions

Explore conceptually related problems

Assertion: Species is a genetically closed system. Reason: Because the reproductive isolation constitutes the most important boundary between different species.

Assertion:- The reaction quotient Q, has the same presentation form as the equilibrium constant K and Q is evaluated using any given concentrations of the species involved in the reaction, and not necesssarily equilibrium concenetrations. Reason:- If the numerical value of Q is not the same as the value of equilibrium constant, that time reaction will never proceed.

Knowledge Check

  • Assertion : In barrier methods, ovum and sperms are prevented from physical meetings Reason : Barrier methods are used during coitus, to prevent the entry of ejaculated semen into the female reproductive tract.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false

    • Similar Questions

    Explore conceptually related problems

    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.

    Assertion: The biological concept of species is based on reproductive isolation. Reason: Tigon is the interspecific sterile hybrid produced in captive condition

    Assertion :- Outbreeding never involves breeding between individuals of same breed. Reason :- Outbreeding is carried out between individuals of different breed or species.

    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.

    Home
    Profile