And enzyme-based cleaner should be used ___ at least once a week to eliminate the organic matter in which flies breed. • under equipment
• in cracks and crevices
• Inside refrigeration units
• In the drains

Which of the following is a health risk associated with ground-level ozone? a.cataractsb.skin cancerc.respiratory illnessd.all of the above

Which of these is likely to be the best source of valid health information?

Which action occurs in the third stage of cell division? a. the nuclear material of cell is copied exactly. b. the nuclear membrane disappears. c. the cell forms two nuclei d. the nuclear material separates, with half moving to either side of the cell.