Question: You are a research assistant working in a toxicology laboratory and you are studying a new therapeutic drug that is being developed by another chemical company. You expose a group of animals to a dose of the chemical of 20 milligrams per kilogram of animal weight (20mg/kg) and you notice that 50% of the treated animals die from that dose. Which of the following definitions best describe that dose of the chemical? Question 9 options: That dose is defined as carcinogenic. That dose is best described as the effective dose in 50% of the animals (ED50). That dose is best described as the lethal dose in 50% of the animals (LD50). That dose is described as the LD20, as 20 mg/kg is required to kill half of the animals. None of the definitions are correct. Need Assignment Help?