Plants are mainly multicellular organisms, predominantly photosynthetic eukaryotes on the kingdom Plantae, which would exclude fungi and several algae. Plant cells ended up derived by endosymbiosis of the cyanobacterium into an early eukaryote about one billion a long time ago, which gave rise to chloroplasts.[133] The very first quite https://directivepublications.org/the-journal-of-radiation-oncology/