It can be 3n, 4n or more. It arises as a result of meiotic irregularities and gives rise to sterile progeny which can still reproduce asexually. Polyploidy can be induced by treatment of colchicine. Triploid offspring can be produced by crossing a colchicine-induced or naturally occurring tetraploid and a diploid. Plant biology Plants are eukaryotic, multicellular organisms.
Fungi are different because they lack chlorophyll and chloroplasts, their cell walls contain chitin.
Algae were formerly thought to be plants because of their rigid cell wall and photosynthesizing ability. They are, however, currently placed in the Kingdom Protoctista because of the variety of cell pigments, cell wall types and different forms and structures. See Plant Anatomy and Physiology . The female gametophyte remains protected in the carpel of the flower. This consists of the ovum and several other haploid cells.