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​Mariposa is lying in her crib, and is making elongated single vowel sounds, like “ahhhhhhh” and “oooooooh.” Which of the following best describes her verbalizations?

​Out of the 200-500 million sperm cells that are released during an ejaculation, only ____ complete the short journey up the Fallopian tubes to where an egg is waiting to be fertilized.

​If a child experiences many birth complications, and later experiences different types of family adversity, she is at an increased risk for developing _________.

​The role of experience, focusing on whether actions are rewarded or punished, is a central tenet in ____ theory.

​Suzy wants to study whether there is a relationship between the phases of the moon and the tides that occur in the ocean. She does so by making nightly observations of the moon and recording its phases, and by measuring the tides of the ocean at regular intervals every day and night. The type of research that Suzy is conducting is best described as

​According to a research study described in your textbook, parents are more likely to encourage

​The debate about the value of breast-feeding versus bottle feeding is one of the most critical issues for new parents to explore. According to your chapter, breast-feeding is the more beneficial choice for all but which of the following reasons?

​Cohort effects are most likely to be a problem when it is difficult to separate the effects of developmental  processes from ____ when examining age effects across a wide range of ages.

​Stranger _______________ first emerges around six months of age, when children demonstrate anxiety when in the presence of unfamiliar people.

​Wilma is afraid of the pain involved in delivering her baby. Are childbirth classes likely to help her?