Which statement about the recommendation for daily physical activity is true ?

a. it should be a vigorous
b. it should be a mix of moderate , low and vigorous
c. it should be continual and not broken into several sessions
d. it should be moderate to vigorous

What is the difference between a joint and a fault? a)a joint is formed by confining pressure. b)a joint is formed by differential stress but a fault is not. c)a fault is formed by tension but a joint is formed by compression. d)a fault displaces the rocks on one side relative to another.

Which of the following viruses would most likely have reverse transcriptase? a) an rna-based lytic virusb) an rna-based lysogenic virusc) a dna-based lytic virusd) a dna-based lysogenic virus

What nutrients prevent osteoporosis? a. all vitamins and minerals b. calcium, vitamins c, d, and k, and magnesium c. protein d. carbohydrates