Question

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

Options

• no other path of follow

• it grows under the control of egg nucleus

• attracted by dissimilar electric charge

• the filiform apparatus of synergids is believed to attract the pollen tube.

Answer 1

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.

Explanation:

In porogamy, the filiform apparatus of synergids secretes chemotropically active sunstances that lead the pollen tube to the ovule's micropyle.