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Both, autogamy and geitonogamy are prevented in
[2012]
  • a)
    Papaya
  • b)
    Cucumber
  • c)
    Castor
  • d)
    Maize
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Both, autogamy and geitonogamy are prevented in[2012]a)Papayab)Cucumbe...
Autogamy involves pollination within the same flower, while geitonogamy involves transfer of pollen grains from the anther of one flower to the stigma of another flower of the same plant. Both the process are prevented in papaya because it is dioecious plant(i.e, male and female sex organs are borne on separate plants) and it always needs cross-pollination. 
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Most Upvoted Answer
Both, autogamy and geitonogamy are prevented in[2012]a)Papayab)Cucumbe...
Both autogamy and geitonogamy are prevented in papaya bcoz autogamy is defined as transfer of pollen from anther to the stigma of the same flower and geironogamy is define as transfer of pollen grain from anther to the stigma of another flower but in same plant but papaya is dioceous so both the processes prevented in it
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Community Answer
Both, autogamy and geitonogamy are prevented in[2012]a)Papayab)Cucumbe...
Date palm , papaya & nutmeg are some examples of dioecious plants. hence autogamy & geitonogamy are prevented.
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