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Within 36 hours after conception, the zygote consists of ______ cells.

If we positively reinforce an infant for engaging in a behavior, what kind of learning approach are we utilizing?

When looking at human faces, infants under two months of age prefer to look at

What makes the placenta unique in origin?

When we evaluate Piaget’s theory, we can conclude that

The following person is MOST likely to be given an amniocentesis:

When the heart begins to beat in the developing embryo,

At about 18 to 22 months of age, there is a rapid burst in vocabulary. Approximately 75% of the words added during this time are nouns. This vocabulary burst can be called

The second stage of childbirth

Prenatal development can be thought of in terms of the germinal, embryonic, and fetal periods. Or, it can be thought of as three trimesters. In terms of the way time is divided into periods, these two viewpoints are