Humans can hear frequencies between about cycles per second

When it comes to motor development:

a. it is simply a process of unfolding genetic tendencies (maturation). b. it depends solely upon experience and the environment. c. it is dependent upon a combination of maturation and experience. d. There is no way to answer this question.

Which of the following is true of abused children?

A) They have low self-esteem and perform poorly in school. B) They are more intimate with peers. C) They are likely to be diagnosed with Down syndrome later in life. D) They are unlikely to act aggressively toward their intimate partners when they reach adulthood.