Question

After pollen lands on the stigma of a flower, which of the following happens first?

A) Fertilization takes place.
B) The pollen units with an egg cell.
C) The pollen grows a tube to the ovary.
D) An embryo grows inside the ovary.

Answer 1

$answer$

Option A

Fertilization takes place...

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Answer 2

Answer:

Option C, The pollen grows a tube to the ovary.

Another word for this is chemotropism. After pollen lands on stigma, fertilisation won't take place. First, it has to reach the ovary of the flower. For this, the pollen grain grows a tube.