Because of the rapid growth of basic structures, the developing fetus is sensitive to a variety of diseases, drugs, and sources of radiation, especially during which part of the pregnancy?

The most common reactions to sleep loss up to 48 hours

a. include inattention, staring, and tremor of the hands. b. include hallucinations and delusions. c. include insomnia. d. are similar to those found in psychosis.

The average score on a scale is the __________

a. mean b. mode c. median d. standard deviation