unit12

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Based on the LD50LD50 values, which of the following best describes the toxicity level of the household substances shown in the table?

Antifreeze is more toxic than aspirin.

For a certain insecticide, the LD-50 dosage level for rats is determined to be 250 milligrams per kilograms of body mass. On the basis of this information, which of the following is the best prediction regarding the consequences of receiving this dosage of the insecticide?

Five hundred out of every one thousand rats would die.

The LD50LD50 for arsenic in humans is 13mg/kg13mg/kg. Which of the following approaches should be used to calculate the number of grams of arsenic it would take to reach the LD50LD50 in a 140-pound person? [Note: 1kg=2.2pounds1kg=2.2pounds]

b

A pesticide was applied to a population of roaches, and it was determined that the LD50LD50 was 55mgkg55mgkg. If the average mass of a roach was 0.02kg0.02kg, which of the following approaches will determine the dose in mgmg per roach?

c

Based on the data in the graph, which of the following should be used to calculate the difference in LD50LD50 for the two different species of mice?

c


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