______ holds that genes and environmental influences work hand in hand to eventually allow or prevent developmental behaviors

Almost 20 million adults and adolescents report current use of this substance in the United States, but it is illegal. It produces mild perceptual and sensory distortions, and is usually smoked. It is called ____

a. marijuana c. heroin b. cocaine d. nicotine

The one universal theme amount roadside memorials in the United States is

a. usually painted black b. tend to be secular c. usually found only in cities d. predominately religious in nature