2.  Spore formation

3.  Formation of gametes

4.  Fragmentation

1.  Motile sperms

2.  Vessels

4.  Circinate ptyxis

1.  Ethylene

2.  Gibberellin

4.  ABA

2.  Blue green algae

3.  Bacteria

4.  Anabaena

1.  Abscissic acid in the lateral bud

2.  Cytokinin in the leaf tip

3.  Gibberellin in lateral buds

1.  Manufactures food for itself, as well as for the gametophyte

3.  Produces gametes that give rise to the gametophyte

4.  Arises from a spore produced from the gametophyte

1.  Ethylene

2.  Auxin

4.  Cytokinin

1.  20 meter

2.  30 meter

4.  600 meter

1.  Bacterium

3.  Alga

4.  Virus

1.  Ginko biloba

3.  taxodium mucronatum

4.  Zamia pygmaea