- Homosporous plants are those plants which produce spores of same size and type while Heterosporous plants are those plants which produce spores of two size. Larger spores function as female while smaller as male.
- Syngamy is type of fertilization in which male gamete fuses with female gamete resulting to zygote formation. After this another male gamete fuses the secondary nucleus resulting to endosperm nucleus formation, this is called Triple Fusion.