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Variations caused by mutation, as propos...

Variations caused by mutation, as proposed by Hugo de Vries, are:

A

small and directionless

B

random and directional

C

random and directionless

D

small and directional

Text Solution

Verified by Experts

The correct Answer is:
C
Evolution according to Hugo de Vries is random and directionless but according to Darwin evolution is slow and directional process.
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Knowledge Check

  • What causes mutations?

    A
    Colchicine
    B
    Cosmic rays
    C
    Gamma rays
    D
    Crossing over

  • X- Rays cause mutation by

    A
    Breaking spindle
    B
    Ruptuing of nuclear membrane
    C
    Changing the chromosome morphology
    D
    Incucing karyokinesis

  • Assertion Mutation theory was proposed by Hugo de Vries. Reason Mutations are heritable and subjected to natural selection

    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

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    Gibberish mutation is caused by

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