Cyanobacteria can cluster together into colonies called _______, with some discovered in Western Australia that are 3.5 billion years old. Cyanobacteria produce oxygen and convert sunlight to energy using _______. Plants and arthropods did not make the transition to land until near the end of the _______ Period. Diverse multicellular eukaryotes did not appear until the _______ period. A large multicellular eukaryote requires more _______ to survive than a single-cell eukaryote.