The answer is C. oxygen. Oxygen is the acceptor for hydrogen because in an aerobic reaction oxygen is used.
Systematics is the study of the units of biodiversity. Systematics differs from ecology in that the latter is concerned with the interactions of individuals (and therefore species) in a particular time.
A psychological disorder or a mental disorder is compose of behavioral and psychological symptoms impacting on areas of one's life causing further problems. When a psychiatrist like Dylan works on the causes of the disorder such as chemical imbalances, he is now working on the Biological perspective of the treatment.
The vegetation type is called STEPPE. Steppe refers to the vegetation type in which there are only grassland plains; no trees exist in this eco-region. The countries of the world where this type of vegetation can be found include Russia, Ukraine, Hungary, etc. The steppe biome is a cold, dry grassland that exist in all the continents of the world except in Australia and Antarctica. Humidity level is usually very low in this biome because they are usually located far away from the ocean.
Since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. So as the mass of either object increases, the force of gravitational attraction between them also increases. If the mass of one of the objects is doubled, then the force of gravity between them is doubled. If the mass of one of the objects is tripled, then the force of gravity between them is tripled. If the mass of both of the objects is doubled, then the force of gravity between them is quadrupled; and so on.
Hope this helps.
