Why is it harder to evaluate the toxicity of one chemical by itself compared to that chemical combined with another chemical?
What will be an ideal response?
When chemicals are combined, they can produce a synergistic effect that often magnifies the impact of their individual effects. When trying to predict the effects of chemical A and chemical B in an organism, the overall effect may be much greater than the individual contributions. The number of possible combinations that must be tested when multiple chemicals are involved is large and presents barriers to understanding this complex problem.
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What kind of boundary is most likely to have volcanoes and earthquakes associated with it
a) divergent b) transform c) convergent d) all of the above
A given isotherm in the Northern Hemisphere during the winter,
a. bends equatorward over the continents. b. bends equatorward over both the oceans and the continents. c. bends pole-ward over the continents. d. bends equatorward over the oceans.
The geological time scale uses equal intervals for dividing Earth's long history in a series of eons, eras, periods, and epochs
Indicate whether the statement is true or false
What are some of Quebec's most serious environmental hazards, and why is this North American region likely to continue experiencing these kinds of disturbances on a regular basis?
What will be an ideal response?