The ________ stage of prenatal development begins 8 weeks after conception.

In problem solving, the ________ refers to the incomplete information or unsatisfactory conditions you start with, and the ________ refers to the information or state of the world you hope to obtain

a. set of operations; goal state b. initial state; goal state c. goal state; set of operations d. set of operations; initial state

Skeletal age is determined by __________ to see the extent to which soft, pliable cartilage has hardened into bone

A) X-raying the long bones of the body B) measuring the circumference of the skull C) X-raying the spinal cord and teeth D) measuring the length of the arms and legs