The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
Answer: A. Eukarya
Explanation: the three domains are the Archaea the Bacteria and the are Eukarya. Prokaryotic organisms belong to either the domain Archaea or the domain bacteria organisms with eukaryotic cells belong to the domain Eukarya.
Photosynthesis puts oxygen in the atmosphere.
O Biogeographic isolation affects the random changes that take place within gene pools. Should be the correct answer