In toxicology studies, LD50 is best described as ________
A) the dose at which 50% of an exposed population is killed
B) the dose at which 50% of an exposed population develops disease
C) the dose at which 50% of an exposed population develops a chronic effect from the toxicant
D) the dose at which at least 50% of the exposed population is not affected by the toxicant
A
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Critical reading involves which of these processes?
The ability to parrot back the information upon request Generally ignores pictures and tables that appear with the text Simply understanding the information in the text Identifying the patterns, meaning and application of the material.
An electroscope is charged positively as shown by foil leaves that stand apart. As a negative charge is brought close to the electroscope, the leaves
A) fall closer together. B) spread farther apart. C) do not move.
Divergence aloft suppresses thunderstorm activity
Indicate whether the statement is true or false