Plants are primarily multicellular organisms, predominantly photosynthetic eukaryotes from the kingdom Plantae, which would exclude fungi and some algae. Plant cells had been derived by endosymbiosis of the cyanobacterium into an early eukaryote about 1 billion decades ago, which gave rise to chloroplasts.[133] The main numerous clades that emerged https://directivepublications.org/the-journal-of-radiation-oncology/