Erythropoietin is a hormone that is released from the kidneys to stimulate the production of red blood cells.
The answer to your first question is Carbon dioxide. Carbon dioxide is a waste product made by cells during cellular respiration.
The answer to your second question is the second option, <span>By showing that the numbers of atoms of the same type are equal on both sides. Atoms cannot be destroyed or created, so if the equation is balanced and you have the same number of atoms, then that proves the Law of Conservation of Mass.
Hope this helps!</span>
Superior adaptations and are the ones that evolution picked to be the fittest to survive.
The answer would be the capsule
The reward system in the brain is the center of wanting and pleasure, and is the main cause of repeated actions because of the release of some neurotransmitters which does ensure the survival of one's self and offspring. The behavior is a part of organism and organizational level, and neurotransmiters are part of the cellular level.