“Our digestive system is designed with a …”

A. Unidirectional body plan with a series of compartments and two openings

B. Bidirectional tube that has a central body cavity and one opening

C. Bidirectional tube with separate compartments and two openings

D. Unidirectional body cavity with one opening in the middle of the body plan

PLEASEE HURR

Which of the following is an important function of child-directed speech? (a) it captures the infant’s attention and maintains communication. (b) it reduces the occurrence of infantile amnesia for the earliest memories of infancy. (c) it reduces the need for reciprocal interaction between caregivers and children. (d) it assists in prolonging rem sleep in infants.

Which of the following is a nonspecific defense against pathogens? - b cells - antibodies - t-cells - inflammation

Which of the following are examples of coordinate headings