About Lesson
Kingdom Plantae
Comprise of all plants.
General Characteristics
- ** Body is differentiated into roots, stems and leaves.
- ** Cells have cellulose cell walls.
Most of their cells have chloroplasts.
- ** Show alternation of generations
i.e. life cycle consist of gametophyte (gamete producing) and sporophyte (spore producing) generations.
- ** Have vascular (transport) tissue.
Phloem translocate manufactured food from the leaves to other parts of the plant.
Xylem conducts water and mineral salts from the roots up the plant.
- Are multicellular.
Their cells have membrane bound organelles.
- Reproduce both sexually and asexually.
Sexually through the fusion of gametes.
Asexually through vegetative propagation e.g. budding, suckering.
- Some are terrestrial or aquatic while others are semi-terrestrial.
Question
What is alteration of generations?
- the existence in the life cycle of an organism of two or more reproductive modes, e.g. sexual and asexual cycles
Kingdom Plantae is divided into three main divisions;
- Division Bryophyta
- Division Pteridophyta
- Division Spermatophyta
