Have non-living, jelly-like mesoglea connective layer between their two membrane layers.
a. cnidarians
b. lophotrochozoans
c. ecdysozoans

What would happen if a person gets only three hours of sleep every day?

What organs or body system is affected by ebola

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.