The muscles, blood, and the excretory system develop from which of the following layers of cells present in the embryo?

Rich's IQ is around 70, much like his siblings, his parent's and his grandparents. There is no known cause of intellectual disability in his family. This is an example of _________

a. Cultural-familial retardation b. Normalization c. Phenylketonuria d. Autism

The series of federally sponsored tests given in the United States is called the ______

Fill in the blank with correct word