1.  Polar tube

2.  Pollen sac

4.  Male gametophyte

2.  4-5

3.  2-3

4.  Single

1.  5-celled

2.  6-celled

3.  7-celled

1.  Prothallial cell/vegetative cell

2.  Antipodal cell and synergids

4.  Generative cell

1.  Egg nucleus

2.  Nucleus of synergids

4.  Nuclei of antipodals

2.  Mangifera

3.  Impatiens

4.   Centranthera

1.  Appear in 100% cases

2.  Appear in 50% cases

3.  Appear in 3:1 ratio

2.  Becomes nuclear

3.  Remains as it was

4.  Degenerates

1.  Nuclear

2.  Cellular

3.  Helobial

1.  Magnolia

2.  Hypericum

4.  Opilia