Assignment:
Q1. Animal rights groups often target the LD50 standard as an example of callous indifference to animal welfare. Other groups argue that standards such as LD50 are necessary to ensure drug safety and effectiveness. Take a position on the issue and write a letter to the editor of a newspaper defending your position.
Q2. During a lifetime, you will eat a prodigious amount of food, estimated to be about 700 times your adult body weight. This statement is itself quite a prodigious assertion. Do calculations to check that the statement is in the ballpark. State all of your assumptions clearly.
Hint: Start by assuming a lifespan of approx. 78 years and that you present weight is 160 pounds. Estimate the weight of food eaten daily at present, and use these data to project your lifespan consumption of food.
Q3. Sometimes authors get carried away with their rhetoric. Check the correctness of the claim that the DNA in an adult human being would stretch from the Earth to the Sun over 60 times. It is approx. 93 million miles from the Earth to the Sun.
Note: You contain about 10 million million (10 X 10 to the 12th power) cells that have a nucleus. The genetic instruction is organized in 23 pairs of chromosomes approx. 100,000 genes, each of which conveys one or more hereditary traits (human genome). If all of the DNA in all 10 million million of your cells were placed end to end, the resulting ribbon would stretch from here to the Sun more than 60 times.
Provide complete and step by step solution for the question and show calculations and use formulas.