It is not until the ___________ stage, which begins at about age 10, that children become fully aware that formal game rules can be modified if the people who play them agree

In the situation where both the mother and the father carry the sickle-cell trait, what is the probability that they will produce a child with the sickle-cell trait?

A. 25% B. 50% C. 75% D. 100%

The subdivision of the peripheral nervous system that is made up of all nerves carrying messages from the senses to the central nervous system and all nerves carrying messages from the central nervous system to skeletal muscles is called the __________

a) autonomic nervous system. b) parasympathetic nervous system. c) somatic nervous system. d) central nervous system.