Question

Differentiate between homosporous and heterosporous pteridophyte .

Answer 1

Homosporous Pteridophytes vs Heterosporous Pteridophytes
Homosporous pteridophytes are the vascular plants that produce only one type of spore. This spore contains both male and female parts. Heterosporous pteridophytes are the vascular plants that produce two types of spores, and thus the male and female parts can be distinguished.
Size
All spores are the same size in homosporous pteridophytes. The spores are of different sizes – Microspores are smaller in size whereas megaspores are larger in size.
Gametophyte
Homosporous pteridophytes produce only one type of gametophyte containing both male and female parts. Hence gametophyte is monoecious. Produce two types of gametophytes: male gametophytes (microspores) and female gametophyte (megaspores). Hence gametophyte is dioecious.
Examples
Lycopodium, Equisetum.
Heteropetridyophytes Selaginella, Marseli.

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Answer 2

Dear Student,

● Homosporous Vs Heterosporous pteridophytes -

1. In homosporous pteridophytes, spores are equal size. In heterosporous pteridophytes, spores are unequal.
2. In homosporous pteridophytes, one kind of spores are formed. In heterosporous pteridophytes, two types of spores - microsporangia and macrosporangia.
3. In homolosporous pteridophytes, all spores produced from same sporangia. In heterosporous pteridophytes, spores produced from microsporangia & macrosporangia.
4. Homosporous pteridophytes example - puzzlegrass. Heterosporous pteridophytes example - Salvinia.

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