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After penetrating stigmatic and stylar tissue, the pollen tube usually grows towards egg because

(A) there is no other path to follow

(B) it grows under the control of egg nucleus

(C) it is attracted by antipodals

(D) the filiform apparatus of synergids is believed to attract the pollen tube

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After penetrating stigmatic and stylar tissue, the pollen tube usually grows towards egg because the filiform apparatus of synergids is believed to attract the pollen tube.

So, The correct option of this question is (D).

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