The definition of a concubine is a woman who is a mistress to a man with a wife or who cannot be married to her because of a difference in social status. An example of a concubine is one of the mistresses of an important king who has many wives and mistresses. concubine. concubine.
How do you identify a tree species? It is known that mature, leafy trees, such as redwoods, aspens and oaks, are the best producers of oxygen. Additionally, it is known that a tree produces higher volumes when growing than when mature, because converting air and soil into wood causes the tree to produce more oxygen.
Most of Earthâs oxygen comes from tiny ocean plants â called phytoplankton â that live near the waterâs surface and drift with the currents. In April, 2013, NASAâs Aqua satellite captured this true-color image of the dynamic growth of a springtime phytoplankton bloom in the Bay of Biscay, off the coast of France.