Erythropoietin (epo), a hormone produced by the kidneys, is released into the blood when blood oxygen levels are low. epo stimulates the production of erythrocytes by red bone marrow. if an individual spends a considerable amount of time at high altitudes where atmospheric oxygen is reduced, the levels of epo would be /higher/lower) than in comparison to living at sea level.

Match the order of the levels of organization in nature with the correct description. example: atoms are fundamental units of matter= level 1levels- 2,3,4,5,6,7,8.now what levels are these? population consists of organismscells consist of moleculesecosystems consist of communities interacting with there environmentmolecules consist of atomsthe biosphere consist of all ecosystems on earthcommunities consists of populationorganisms consist of cells