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Assertion : The theory of survival of th...

Assertion : The theory of survival of the fittest is widely misunderstood.
Reason : Evolution does not always increase the chances of a species survival and species do not survive when mich chances happen rapidly.

A

Both Assertion and Reason are true, but Reason is the correct explanation of Assertion

B

Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion

C

Assertion is true, but Reason is false

D

Assertion is false, but Reason is true

Text Solution

Verified by Experts

The correct Answer is:
b
A species composed of only a few organisms who has limited genetic variations and mating possibilities or conditions for survivial, change and some of these organisms die dut to their lack of characteristics that could accommodate that change, the species would become smaller over time eventually die out
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Knowledge Check

  • Assertion : Chances of survival of young ones is greater in viviparous organisms. Reason : All mammals are viviparous.

    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.

  • Assertion (A): Variation is minimum in asexual reproduction. Reason (R) : All variations in a species have equal chance of survival.

    A
    Both (A) and (R) are true and (R) is correct explanation of the assertion.
    B
    Both (A) and (R) are true but (R) is not the correct explanation of the assertion.
    C
    (A) is true but (R) is false.
    D
    (A) is false but (R) is true.

  • Assertion: The process of extinction is random. Reason: Any species not adapted to environmental con- ditions cannot survive.

    A
    If both Assertion and Reason are true and the reason is the correct explanation of the assertion, then mark (1).
    B
    If both Assertion and Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
    C
    If Assertion is true but Reason is false, then mark (3 ).
    D
    If both Assertion and Reason are false, then mark (4).

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    When we say ' survival of the fittest ' , does it mean that (a) those which are fit only survive (b) those that survive are called fit? Comment.

    Assertion (A):The Darwinian theory of natural selection sometimes referred to as 'the survival of the fittesť explains the origin of many species as a normal process of descent rom parent forms. Reason (R): The contemporary distribution pattern of many organisms is often the result of natural migration or dispersal from original center (s) of development.

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