1. Which of the following is a nonspecific barrier defense? Mucous membranes Marcrophages natural killer cells Antibodies

According to naeyc, are the youngest age group that may be out of the hearing range of supervising teachers for short periods of time. preschoolers infants kindergarteners toddlers

Which is a physical sign of stress? a: unexplained euphoria b: feelings of invincibility c: inability to sleep d: visual hallucinations

Social sciences are the observable facts or events that involve human society. select the best answer from the choices provided t f