Distinguish between homosporous and heterosporous conditions with examples
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In the condition of thePteridophytes,
1. In Homosporous pteridophytes only one kind of spore is produced. In Heterosporous pteridophytes two kinds of spores are produced.
2. The spores are equal in size in homosporous. The smaller spores are called microspores and the larger spores are called megaspores in heterosporous.
3. The spores are produced from the same sporangia in homosporous. The microspores are produced from the microsporangia and the megaspores are produced from the megasporangia in heterosporous.
4. In the homosporous, spores develop one kind of gameto-phyte. In the heterosporous, the microspore develops into male gametophyte whereas the megaspore deielops into female gametophyte.
5. In the homosporous, Spores germinate in soil and produce independent gametophyte. In the heterosporous, Spores germinate within sporangia and produce dependent gametophyte.
6. Examples of Homosporous pteridophytes are Lycopodium. Examples of Heterosporous pteridophytes are Selaginella and Salvinia.
1. In Homosporous pteridophytes only one kind of spore is produced. In Heterosporous pteridophytes two kinds of spores are produced.
2. The spores are equal in size in homosporous. The smaller spores are called microspores and the larger spores are called megaspores in heterosporous.
3. The spores are produced from the same sporangia in homosporous. The microspores are produced from the microsporangia and the megaspores are produced from the megasporangia in heterosporous.
4. In the homosporous, spores develop one kind of gameto-phyte. In the heterosporous, the microspore develops into male gametophyte whereas the megaspore deielops into female gametophyte.
5. In the homosporous, Spores germinate in soil and produce independent gametophyte. In the heterosporous, Spores germinate within sporangia and produce dependent gametophyte.
6. Examples of Homosporous pteridophytes are Lycopodium. Examples of Heterosporous pteridophytes are Selaginella and Salvinia.
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Answer:
Pteridophytes produce two types of spores, homo spores and hetero spores. In case of homo spores, spores that is released are of similar sizes.
Incase of hetero spores, the spores that is produced by pteridophytes is variable in size. One is micro spore and another is macro spore.
In this condition, the micro spore develops into male gamete and mega spore develops into female gamete.
Example of homospores:Lycopodium
Example of hetero spore: Selaginella and Salvinia
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