Marsha's father often tells her he wishes she were never born. His comments would be considered

A teratogen is:

A) an environmental agent that can produce a birth defect B) A genetic or chromosomal abnormality that may produce a developmental disorder C) any physical defect in an unborn child D) A fertilized egg that undergoes rapid cell division

According to Piaget, children

a. develop the skills that lead to object permanence by 3 months of age. b. develop an understanding of object permanence all at once. c. come to understand object permanence even without prior experience. d. develop object permanence before they develop emotional bonds to specific caregivers.