Klinefelter's syndrome involves an extra ______

Chester is irritable, loud, and negative most of the time. He doesn't like it when new people pick him up, and he has irregular sleeping, eating, and waking schedules. What temperament does he exhibit?

a) active b) slow-to-warm-up c) difficult d) easy

Doug is told that his wife should not visit his office during the second and third month of her pregnancy because chemicals there could negatively affect the development of their baby

However, he is also told that it would be safe for her to visit after the fourth month, since the chemicals would not affect fetal development. This example highlights the concept of: a. critical period b. gross-to-specific trend c. fetal development d. ectopic pregnancy risk