The LD50 indicates the ___.

a. amount of toxicant it takes to kill half the population
b. lowest dose that kills 50 out of 1000 members of the population
c. lowest dose required to cure half the population
d. lowest dose that kills any member of the population


a. amount of toxicant it takes to kill half the population

Environmental & Atmospheric Sciences

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The more intense the precipitation, the more intense the radar echoes that bounce off it

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Which piece of glassware do we generally use to deliver a predetermined fixed volume of solution in a titration?

A) an Erlenmeyer flask B) a graduated cylinder C) a volumetric pipet D) none of the above

Environmental & Atmospheric Sciences

The dry adiabatic rate (DAR) applies to a parcel of air that is saturated

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

All of the following are arguments in favor of globalization, EXCEPT

A) globalization is a logical expression of international capitalism that will benefit all peoples and all nations. B) globalization encourages the spread of beneficial new technologies and ideas. C) the removal of trade barriers will cause inefficient local industries to become more efficient, and more able to compete internationally. D) each country and region of the world will profit by concentrating on the activities for which they are best suited in the global economy. E) globalization will lead to world peace.

Environmental & Atmospheric Sciences