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49: 18

which of the following are two mechanisms for water pollution?

a.

high and low

b.

direct and indirect

c.

lethal and nonlethal

d.

harmful and innocuous

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 description best defines the nervous system and its two main branches? a: the message center of the body, split into the autonomic nervous system and the somatic nervous system b: the control panel of the body, split into the central nervous system and the exterior nervous system c: the message center of the body, split into the central nervous system and the peripheral nervous system d: the control panel of the body, split into the brain and the spinal cord

Which part of the female reproductive system produces sex hormones and contains eggs? the uterus the ovaries the vagina the fallopian tubes