All chemicals in commercial use were screened for toxicity before they were deemed acceptable for use
Indicate whether the statement is true or false
F
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As surface water travels from land and merges with water in a stream, it becomes____________________
Fill in the blanks with correct word
Ellen Johnson Sirleaf became the first elected female head-of-state in Africa in 2006. In which nation was she elected President?
A) South Africa B) Democratic Republic of the Congo C) Zimbabwe D) Liberia E) Tanzania
Which of the following can pass through a dialysis membrane?
A) colloidal particles B) macromolecules C) small molecules D) all of them
Of the following, one that is true:
A. the intensity of hurricanes is increasing each year B. hurricanes are steadily moving northward each year C. the number of hurricanes is increasing each year D. the number of tornadoes is increasing each year