After penetrating stigmatic and styler tissues, the pollen tube usually grow down towards the egg because
After penetrating stigmatic and styler tissues, the pollen tube usually grow down towards the egg because
- A
The egg cell attracts the pollen tube as they have dissimilar electric charge
- B
The filiform apparatus of synergids is believed to attract the pollen tube
- C
It has no other passage to follow
- D
It grows under control of nucleus
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