Toxicants that interrupt essential biochemical processes in organisms by blocking one or steps in important biochemical reactions are known as ________
A) mutagens
B) pathway inhibitors
C) insecticides
D) neurotoxins
E) carcinogens
B
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Concerned about the exposure of children to chlorine, staff running a public pool measure the exact concentration of the chlorine currently in the pool water
However, assuming the amount of water in the pool is unchanging, to accurately determine the dose of chlorine exposure, the staff must also know ________. A) why each child is in the pool B) the manufacturer of the chlorine C) how long each child is in the pool D) the age of each child in the pool
One widely used method for desalinating water is ____.
A. activated carbon filtration B. subsidence C. transpiration D. reverse osmosis E. treadle pumping
When space debris blazes through Earth's atmosphere as a streak of light or shooting star, it is referred to as a ________.
A. meteorite B. moonlet C. meteor D. sunspot E. falling star
The Big Bang occurred roughly ____ years ago.
Fill in the blank(s) with the appropriate word(s).