Question

Arrange the following steps in the correct sequence of pollen-pistil interaction: (1) Pollen tube enters synergid, (2) Pollen lands on stigma, (3) Pollen tube grows through style, (4) Compatible pollen hydrates and germinates

Options

• (1) → (2) → (3) → (4)

• (2) → (4) → (3) → (1)

• (4) → (2) → (3) → (1)

• (2) → (3) → (4) → (1)

Answer 1

The correct sequence of pollen-pistil interaction is: (2) pollen lands on the stigma, (4) compatible pollen absorbs water and germinates, (3) the pollen tube grows through the style toward the ovary, and (1) finally the pollen tube enters a synergid in the embryo sac. Each step logically follows from the previous one.