Q.

A genetically controlled out breeding device that prevents germination and growth of pollen tube, when pollen grains of the same plant are deposited on the stigma of a flower is referred as

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a

Anther and stigma placed different positions,

b

Self incompatability,

c

Production of unisexual flowers,

d

None of these.

answer is B.

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Detailed Solution

Refer NCERT text book,Vol.II, page no.31

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