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CSS :: Variations and Mutations


1.  Organic variations occur ultimately through:
A. Sexual reproduction B. Sexual selection
C. Natural selection D. Mutation

2.  Variations are:
A. All the dissimilarities of environmental conditions B. All the dissimilarities
C. All the dissimilarities between environmental conditions and animals D. None of these

3.  Somatogenic variations are dissimilarities which:
A. Confine to 'soma' only and are heritable B. Confine to 'germ' and are inheritable
C. Confine to 'soma' only and are inheritable D. Confine both to 'soma' and 'germ' and are often heritable and often non-heritable

4.  All somatogenic variations are:
A. Heritable B. Often non-heritable
C. Always non-heritable D. Partially heritable

5.  Which of the following are somatogenic variations:
A. Wrestler's muscles B. Small feet of Chinese women
C. Circumcised penis of Muslims D. All of these

6.  Which of the following is not an example of somatogenic variation:
A. Pierced nose and ear of subcontinental women B. Well developed muscular right arm of blacksmith
C. Dancing talent in parents D. Birth of monstrous babies in progenies of people of Hiroshima and Nagaski

7.  Hereditary variations can be produced in plants by using:
A. Auxins B. X-ray
C. Gibberellic Acid D. DDT

8.  Discontinuous variations are:
A. Mutations B. Acquired characters
C. Essential features D. Non-essential features

9.  There would have been no organic evolution if:
A. The individuals did not transmit acquired characters to their offsprings B. Individuals in a population did not show gene variation
C. Somatic variations did not get inherited D. Somatic variations did not get transformed into genetic variations

10.  In absence of of organic evolution there world have been:
A. No specification B. Only one species on the earth
C. Absence of variations D. All of these




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