Question

Differentiate between the following:

Homosporous and heterosporous pteridophytes

Answer 1

	Homosporous pteridophytes	Heterosporous pteridophytes
1.	In these pteridophytes, only one kind of spore is produced.	In these pteridophytes, two kinds of spores are produced.
2.	The spores are equal in size.	The smaller spores are called microspores and larger spores are called megaspores.
3.	The spores are produced from the same sporangia.	The microspores are produced from the microsporangia and the megaspores are produced from the megasporangia.
4.	The spores develop one kind of gametophyte.	The microspores develop into male gametophytes, whereas the megaspore develops into female gametophytes.
5.	Spores germinate in soil and produce independent gametophyte.	Spores germinate within sporangia and produce dependent gametophyte.
6.	eg. Lycopodium	eg. Selaginella, Salvinia