Algae: Simple structure, single-celled or multicellular individuals.
Bryophytes: The leaves of bryophytes have only one layer of cells.
Pteridophytes: Pteridophytes are multicellular plants.
Second, the plant organs are different.
Algae: Algae plants have no roots, stems, leaves and other organs.
Bryophytes: Bryophytes have stems, leaves and roots.
Pteridophyte: Pteridophyte has roots, stems, leaves and other organs.
Third, the living environment is different
Algae plants: Algae plants have chloroplasts in their cells, which can carry out photosynthesis, and most of them live in water.
Bryophytes: Bryophytes usually live in a dark and humid environment.
Pteridophytes: Most pteridophytes like to live in the warm and humid environment in Bai Senlin.
Baidu encyclopedia-pteridophytes
Baidu encyclopedia-algae plants
Baidu encyclopedia-bryophytes