Place these events in the correct order for double fertiliza

Place these events in the correct order for double fertilization.

pollen tube growth

pollintation

formation of zygote and endosperm

union of sperm and egg

pollen tube enters embyro sac

mitosis of generative cell

union of sperm and polar nuclei

Solution

Events of double fertilization:

1. Pollination is the transfer of pollen grains from anther to stigma.

2. When the pollen grain touches the stigma, pollen tube grows towards the embryo sac.

3. During this growth, generative cell divides by mitosis into two haploid gametes.

4. The pollen tube enters the embryo sac.

5. One male gamete fuses with egg cell of the ovule and forms zygote.

6. The other male gamete fuses with the polar nuclei and forms endosperm, which is triploid.

Pollination Pollen tube growth  Mitosis of generative cell Pollen tube enters embryo sac Union of sperm and egg  Union of sperm and polar nuclei  Formation of zygote and endosperm.