Question

1. use the following information to answer question 1.

an entire population of 500 organisms is exposed to a chemical that has an ld₅₀ of 10 g/kg.

1. how many of these 500 organisms would be expected to survive the exposure to 10 g/kg of the chemical?

a. 0
b. 50
c. 250
d. 500

Explanation:

Step1: Understand the concept of LD₅₀

LD₅₀ is the dose of a chemical that is lethal to 50% of a population.

Step2: Calculate the number of survivors

If 50% of the population is expected to die, then 50% will survive. For a population of \(n = 500\), the number of survivors \(S=500\times(1 - 0.5)\)

$$S = 500\times0.5=250$$

Answer:

C. 250