The correct order of the three stages of the birth process are labor, delivery of the baby, and expulsion of the placenta and umbilical cord.
a. true
b. false
Ans: a. true
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Smiling and crying
a. are different physiological states that show little impact on emotional development. b. are both voluntarily controlled at birth. c. change and develop independently from the maturation of the cerebral cortex. d. both promote contact with a caregiver.
Which statement about preventing childhood injuries is true?
A) Once they know better, children do not behave in ways that compromise safety. B) Parents should ease off on monitoring preschoolers once they have learned safety rules. C) Because of the high value they place on freedom, American parents rarely ignore safety rules. D) Many parents overestimate young children’s knowledge of safety rules.
______, a type of leukocyte, fight intruders by producing antibodies that attach a particular type of cell.
A. B cells B. T cells C. Macrophages D. Antigens
Which of the following is an example of an age-graded influence?
A) Paul learned to play the violin at age 11. B) Frank got his driver's license at age 16. C) Martina got married at age 34. D) Jesse learned to use a computer at age 21.