There are 3 groups of vascular plants:
1. Pteridophytes
2. Gymnosperms
3. Angiosperms
Characteristics of Pteridophytes: Pteridophytes are the only cryptogams with vascular tissue. Characteristics of Gymnosperms: Gymnosperms are the plants which possess naked seeds...
Characteristic features of class Cyclostomata (Cyclos:
Circular, stoma-mouth) Lat/Grk
1. Members of class Cyclostomata are jaw-less and eel like organisms.
2. Their skin is devoid of scales, soft and smooth, containing unicellular mucus...